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                                                                    EXHIBIT 10.2

                        EXCLUSIVE MANUFACTURING AGREEMENT

        This EXCLUSIVE MANUFACTURING AGREEMENT is made effective as of December
6, 1999, between Natural Alternatives International, Inc., a Delaware
corporation, with offices at 1185 Linda Vista Drive, San Marcos, California
92069 ("NAI") and Custom Nutrition, LLC, a Delaware limited liability company
with offices at 4250 Executive Square, Suite 101, La Jolla, CA 92037 (the
"Company"). NAI and the Company may hereinafter be referred to as the "Parties."

                              W I T N E S S E T H :

        WHEREAS, on March 17, 1999, NAI and FitnessAge Incorporated, Inc.
("FitnessAge") executed a letter or intent which contemplated the formation of a
strategic alliance, including further definitive agreements, including this
Agreement, to carry out the transactions proposed in the letter of intent;

        WHEREAS, substantially concurrently herewith, NAI and FitnessAge have
executed documentation to create and operate the Company; and

        WHEREAS, NAI has agreed to develop and manufacture for the Company
nutritional products as developed from time to time for promotion and resale by
the Company.

        NOW, THEREFORE, in consideration of these recitals and the agreements
hereinafter set forth, and other good and valuable consideration, the receipt
and sufficiency of which is hereby acknowledged, the Parties agree as follows:

1.      Definitions

        1.1 "FDCA" means the Federal Food, Drug and Cosmetic Act, as amended
from time to time, together with all regulations issued by the Food and Drug
Administration and other governmental agencies pursuant thereto.

        1.2 "FTCA" means the Federal Trade Commission Act, as amended from time
to time, together with all regulations issued by the Federal Trade Commission
and other governmental agencies pursuant thereto.

        1.3 "Plant" means NAI's production facilities wherever located.

        1.4 "Product" or "Products" means nutritional products, nutritional and
dietary supplements and related materials or products of any description,
including but not limited to capsules, tablets, powders, liquids, bars and other
forms packaged in any and all manners and intended to be distributed by,
through, or for the benefit of the Company.

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        1.5 "Specifications" means such specifications and quality control
requirements for the Products and for any ingredients and packaging materials as
determined by the Company from time to time.

        1.6 "Technical Information" means all customer and business information
and all formulae, quality control data, test data and all other scientific and
technical data and information relating to the Products which are now owned or
controlled by the Parties or which may hereafter be developed by any Party in
connection with the Products.

        1.7 "Product Cost." The cost of Products developed and manufactured for
the Company by NAI shall be as defined in Section 6.1 hereinbelow.

2.      Product Development

        2.1 Initial Development and Formulation. The Company will develop the
types of Products the Company wishes to sell and distribute directly or for its
benefit, all of which shall be subject to this Agreement, and shall establish
the Specifications therefore. NAI will assist the Company in the design and
formulation of the Products as requested by the Company. NAI shall manufacture
and package the Products, as more specifically provided for herein.

        2.2 Packaging and Labels. The Company and NAI shall collaborate and
cooperate in the design and development of the Products and the marketing plans
therefore, including the Specifications, packaging and labeling of the Products.

        2.3 Ownership of Formulae. It is expressly agreed by the Parties that
the formulae relating to the Products that are the subject of this Agreement,
whether developed by NAI or the Company, shall be and become the sole and
exclusive property of the Company, and NAI agrees to deliver copies of all
formulations to the Company at the time of their initial development or when the
Products are modified according to new formulae developed pursuant to this
Agreement.

3.      Production, Purchase Orders, Rolling Forecast, Inventory, Storage,
Shipping and Reports

        3.1 Production. NAI shall manufacture and package Products in quantities
ordered by the Company in accordance with the Specifications, and the terms and
conditions set forth in this Agreement. NAI shall manufacture all Products it
sells to the Company and shall not purchase such Products from other sources for
resale to the Company unless agreed to by the Company in writing and at the
Company's sole discretion. NAI may develop for its own use in manufacturing the
Products such specifications and quality control parameters as it may deem
appropriate, provided they do not contradict the Specifications. The Parties
agree NAI may supplement or otherwise modify such parameters at any time and
from time to time provided they are in conformance with the Specifications or,
if not within those Specifications, are subject to the Company's prior written
approval which shall be granted or declined within ten (10) business days of a
request therefore. The Company's failure to

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provide written approval to such modifications within the ten (10) business days
shall be deemed a denial of NAI's right to deviate from the Specifications.

        3.2 Purchase Orders. The Company has provided NAI with its initial
purchase order. On or before January 10, 2000, and on or before the tenth day of
each March, June, September and December thereafter, the Company shall provide
NAI with a purchase order covering all Company projected Product requirements
for the calendar quarter commencing on the first day of the following month.
Such production/purchase orders shall be firm on submission and shall be filled
by NAI in conformance with NAI's reasonable and customary procedures, and in
accordance with this Agreement.

        3.3 On-Line Ordering. NAI or its designee shall design, develop and
establish an Internet based ordering system which will permit NAI to receive,
process and fulfill orders from the Company, its distributors and customers via
the world wide web. The Company shall design, develop and establish an Internet
based order placing software that will interface with NAI's Internet based order
processing system and allow the Company, its distributors and customers to place
orders to NAI via the world wide web. The Company and NAI shall meet, confer and
agree upon the structure and operation of the on-line ordering system.

        3.4 Rolling Forecast. On or before January 15, 2000, the Company shall
provide NAI with its forecast of Product requirements for the twelve (12) months
January through December 2000. On or before the tenth day of each March, June,
September and December following the date of the first forecast, the Company
shall provide NAI with production forecast updates covering the following twelve
(12) months commencing on the first day of the following month. Such forecasts
provided by the Company shall be for the convenience of NAI only, and shall not
be binding nor constitute purchase orders.

        3.5 Inventory. NAI shall order and maintain an inventory of raw
materials and packaging materials sufficient to meet the Company's production
needs as determined by the purchase orders provided by it under this Section 3
and NAI's reasonable estimation of its own production needs. NAI shall not be
required to maintain such inventory in excess of a rolling ninety (90) day
supply.

        3.6 Storage and Shipment. NAI shall provide suitable storage and
warehousing space for all Products for the time and to the extent required for
NAI to perform its obligations under this Agreement, which time shall not exceed
fifteen (15) days from the originally scheduled shipping date set forth in the
applicable purchase order for the Products. Products are to be stored in clean
space suitable for storage of food and protection of its contents with respect
to integrity and quality, in compliance with good commercial practice and all
applicable laws, rules and regulations, including, without limitation, FDCA
regulations. Charges, if any, for such storage and warehousing for Products will
be paid by NAI and shall be considered a part of the actual cost of production
and shall be charged to the Company as a part thereof pursuant to Section 6. NAI
shall load Products onto such carriers as it may determine. All Products are
delivered F.O.B. NAI's dock and all risk of loss of the Products shall remain
with NAI until loaded onto such carriers unless the Company and NAI otherwise
mutually agree. The carrier selection, shipment and payment procedures and bill
of lading requirements shall be subject to the Company's

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approval which approval shall not be unreasonably withheld, and shall be in
accordance with any reasonable instructions issued by the Company. Products are
to be shipped via clean trucks and trailers suitable for transportation of food
and protection of its contents with respect to integrity and quality, in
compliance with good commercial practice and all applicable laws, rules and
regulations, including, without limitation, Department of Transportation
regulations. NAI is responsible for shipping all Products in accordance with
this Agreement. Shipping charges shall be considered a part of the actual cost
of production and shall be charged to the Company as a part thereof under
Section 6 below.

        3.7 Shipping Instructions. NAI shall prepare the Products for shipment
to the Company or its designees in quantities and on dates designated by the
Company. The Company shall send shipping instructions via facsimile to NAI at
least three weeks before the shipment date designated by the Company. NAI shall
use its best efforts to accommodate any adjustments to shipping instructions the
Company wishes to make; however, adjustments to shipping instructions made less
than three weeks prior to the requested shipping date may delay shipping dates,
or otherwise be made only upon the mutual agreement of the Company and NAI.

        3.8 Production and Shipping Reports. NAI shall regularly provide the
Company with production reports and shipment of finished goods reports, in such
form as the Company reasonably requests. Reports from NAI's facilities shall be
sent to the Company by facsimile in the manner set forth in Section 17.1.

        3.9 Inventory Reports. NAI shall provide the Company with regular
periodic reports of NAI's inventories of finished Products and raw materials.
The report shall be delivered by facsimile in the manner set forth in Section
17.1.

4.      NAI's Exclusive Status

        4.1 Exclusive Supplier. Except as provided for herein, the Company
agrees to order and purchase all requirements it may have, from time to time,
for all Products from NAI. The Company may enter into other agreements for the
purchase or manufacture of Products during the term of this Agreement without
the prior written consent of NAI if any of the following occur:

               (a) NAI does not currently directly manufacture or produce the
Products that the Company requires or desires and declines to commence
manufacturing or producing them within 15 days of request by the Company;

               (b) The Company can acquire the Products from other supplier(s)
on substantially identical terms as provided in this Agreement and at a lower
cost than that charged by NAI and NAI fails or refuses to meet such price; or

               (c) Any other failed conditions as set forth in Section 4.2 below
occurs.

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        4.2 Failed Conditions. In connection with the Products referenced
herein, if following diligent investigation, inquiry and conference with NAI,
the Company in good faith does not believe NAI satisfies any one or more of the
conditions contained herein or any Products are not being manufactured in
accordance with the Specifications, or that NAI is unable to provide the
Products required, the Company shall give NAI written notice of such
determination. Such notice shall state in detail the condition(s) NAI does not
satisfy, the reasons the Company believes NAI does not satisfy the stated
condition(s), and a detailed statement of facts that would have to exist for NAI
to satisfy the failed condition(s). NAI shall have fourteen (14) days following
receipt of the written notice referenced in this Section to cure any inability
or failure to satisfy any condition(s) listed in a notice from the Company. In
the event such failure cannot be reasonably cured within fourteen (14) days, NAI
may request from the Company whatever longer period is reasonably required,
provided NAI commences such cure within seven (7) days of receipt of a notice
from the Company and thereafter diligently pursues the cure to completion. The
Company shall not unreasonably withhold its consent to such an additional cure
period.

        4.3 Effect of Failed Condition. In the event NAI does not cure its
inability to satisfy the conditions contained in a notice received from the
Company pursuant to Section 4.2 within the time periods set forth therein, then
the Company may, upon the earlier to occur of: (i) expiration of such time
periods; or (ii) receipt of NAI's written notice it will not cure such
conditions, enter into a manufacturing, supply or similar agreement provided the
agreement is with an independent third party to purchase the Products that are
the subject of the failed condition.

        4.4 Alternative Source for Products. The Company may investigate
alternative suppliers of the Products in order to (i) determine whether there
are Products which the Company may desire to purchase that are not directly
manufactured or produced by NAI; (ii) determine whether the Products that the
Company is purchasing from NAI are being offered at the lowest available price;
and/or (iii) to determine the availability of an alternative source for Products
should NAI be unable or unwilling to supply such Products as provided for
herein. The Company reserves the right to enter into Agreements and/or purchase
Products from such alternative sources on terms and conditions substantially
identical to the terms and conditions of this Agreement. NAI shall assist in the
investigation and may recommend possible alternative sources of Products, but
the Company reserves the right to approve any such alternative sources.

5.      Means of Production. NAI shall furnish and maintain, at its own cost and
expense, all equipment or resources necessary to manufacture and package the
Product in accordance with the Specifications and in compliance with federal,
state and local laws, rules and regulations.

6.      Compensation, Payment, Materials and Title

        6.1 Compensation. As full and complete compensation for all services
performed and Products sold hereunder, NAI shall be entitled to receive
compensation on a per Product basis at a price set forth in the then current,
approved price schedule for all Products. From time to time, upon a change in
costs, modification of a Product or development of a new Product, NAI shall
deliver a revised price schedule along with the underlying documentation or
explanation for the price change(s), to the

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Company for the Company's approval, which approval shall not be unreasonably
withheld. Prices for all Products shall not exceed the Company's fully burdened
actual cost of producing the Products, including but not limited to materials,
testing, capitalized equipment costs, labor, capitalized leasehold improvements,
storage, shipping, general and administrative costs. It is the intent of the
Parties that NAI shall charge the Company the full cost of the Products as
determined by Generally Accepted Accounting Principles prior to any profit. The
price paid by the Company to NAI shall include all federal, state and local
taxes that may be imposed on the sale or manufacture of the Products. In no
event, however, shall the price paid by the Company to NAI exceed the price for
which the Company could obtain the same Products from an alternative source on
substantially identical terms as this Agreement. The price to the consumer for
each Product will be established by the Company at the time of establishment of
the Specifications and all subsequent changes thereto shall be made only with
the approval of the Company.

        6.2 Costs. NAI shall to use its best efforts to contain costs by
obtaining competitive prices on raw materials and packaging materials and by
continually reviewing and adjusting its operations in the manner deemed
desirable by NAI to maintain the quality of the Products at the lowest
reasonable cost to the Company, and otherwise to operate efficiently. The
Company shall be entitled, at any reasonable time following advance notice to
NAI, to audit any underlying documents relating to ingredients, packaging
materials and other costs used by NAI to determine the price for Products.

        6.3 Research. The Parties agree that from time to time, the other may
suggest research, development, testing, and studies concerning the Products.
Prior to commencement of such research, the Parties will meet, confer and
cooperate in an effort to determine how to conduct, direct, control, and fund
such research. The conduct of all studies shall be approved by the Company. The
cost of any such research, development, testing and studies will be borne by the
Company, unless otherwise agreed. This Section 6.3 shall not apply to NAI's
testing or development of Products in the ordinary course of NAI's performance
of its obligations under the terms of this Agreement.

        6.4 Invoices. Invoices for Products shall be sent to the Company at the
time of shipment. Payment in full shall be due within thirty (30) days after
receipt by the Company of invoice. A late charge of 1.5% shall be paid by the
Company for every 30-day period, or part thereof, any invoice remains unpaid
after 30 days.

        6.5 Production, Inventory and Audits. The Company and its agents shall
have access to NAI's production plants once each calendar quarter, or otherwise
following reasonable notice, for the purpose of performing production and
inventory audits pertaining to this Agreement. NAI shall be notified in advance
of the names of all visiting personnel or agents and their intended dates and
times of arrival.

        6.6 Title. Title to all Products shall be and remain in NAI until
shipped, at which time title shall transfer to the Company, unless the Parties
otherwise mutually agree.

7.      Quality Control, Testing

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        7.1 Specifications. NAI shall manufacture the Products strictly in
accordance with all applicable laws, rules and regulations, and the
Specifications.

        7.2 Raw Materials. NAI shall store all raw materials, packaging
materials and finished Products in a clean, dry area, free from insects and
rodents, in a manner to prevent entry of foreign materials. Storage and handling
shall be strictly in accordance with the provisions of all applicable laws,
rules, regulations and the Specifications and any reasonable written
instructions issued by the Company.

        7.3 Quality of Materials. NAI shall have each shipment of raw materials
and packaging materials, analyzed for such matters as it may reasonably elect
before any said materials can be used in making and packaging the Product. Such
analysis will be in the nature of quality control and may be conducted in-house
or by an outside laboratory of NAI's choosing. Outside lab tests are intended as
an exception and expenses of the same will be considered a part of the actual
cost of production and shall be charged to the Company as a part thereof. Prior
to the retention of an outside lab, NAI shall notify the Company of its
intention to retain such lab and the reasons therefore. If the Company objects
to paying the cost of the use of an outside lab to perform the tests, NAI will
proceed with the retention and use of such lab at its own risk. All unresolved
disputes related to this issues shall be resolved pursuant to Section 16.3
hereto. All test results are to be documented and copies provided to the Company
at its request and expense.

        7.4 Production Quality. NAI shall perform all in-process and finished
Product checks necessary to assure Product quality. These tests are to be
undertaken as a routine part of the manufacturing process, the cost of which
will be included in the actual costs of production and shall be charged to the
Company as a part thereof. All test results shall be documented and summarized
by NAI.

        7.5 Product Release. A Product shall not be released for shipment unless
it strictly complies with the Specifications and all applicable laws, rules and
regulations. NAI shall place any noncomplying Products on hold. Products that do
not strictly comply shall be put on hold and may be released only with the prior
approval of the Company.

        7.6 Rejected Products. All rejected Products will be disposed of in a
manner consistent with the law and as approved by all Parties to this Agreement.
Approval thereof shall be provided within two (2) business days of request
therefor, and shall not be unreasonably withheld. The Company shall not be
charged for the cost of such rejected Products.

        7.7 Codes. Production codes for Products will be maintained in
accordance with NAI's existing policies as of the date hereof. NAI shall
maintain detailed records on raw and packaging materials usage, finished Product
production by code date and shipping of Products, so that Products can be traced
in case of a recall. Unless necessary to prevent serious injury or death, NAI
cannot initiate a recall or withdrawal of the Products ordered by or shipped to
the Company without the consent of the Company. If a recall or withdrawal must
be initiated before consent of the Company can be obtained, in order to prevent
serious injury or death, notice to the Company must be provided as soon as is
reasonably feasible.

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        7.8 FDCA Standards. NAI's Premises shall be kept and maintained in
conformity with all applicable FDCA requirements and all Products shall be
manufactured consistently with all applicable FDCA requirements.

8.      Plant Inspections, Regulatory Action

        8.1 Plant Inspection. NAI's plant shall meet all requirements
established by state, local or federal regulations including, but not limited
to, Good Manufacturing Practices, Hazard Analysis Critical Control Points
programs and EPA requirements, rules and regulations. The Company and its agents
shall have access to NAI's plant at any reasonable time and all reasonable times
while Products are in process for the purpose of conducting inspections and
performing quality control audits, and shall have access to the results of any
test performed by NAI or at NAI's direction.

        8.2 Regulatory Action. If the Food and Drug Administration or any other
federal, state or local government agency gives notice of or makes an inspection
at any party's premises, seizes any Products or requests a recall, directs any
party to this Agreement to take or cease taking any action, the other Parties
shall be notified immediately, but in no event later than the next business day.
Duplicates of any samples of Products taken by such agency shall be sent to the
other party promptly. In the event of any action described in this Section, the
Parties shall cooperate in determining the response, if any, to be made to such
action and each party agrees to cooperate with, assist and allow NAI to be the
primary spokesperson in responding to any communication or inquiry, and/or
attempting to resolve any such action, and to refrain from any activity with
respect to such action which is not previously approved by NAI, unless otherwise
required by law.

9.      Samples. At its own cost and expense, NAI shall collect and keep
retention samples in accordance with reasonable manufacturer's general practices
for similar products.

10.     Warranty and Inspection

        10.1 Warranty. The Products furnished to the Company or its customers
under this Agreement shall be in conformance with Specifications and free from
adulteration, and NAI does hereby warrant and guarantee to the Company that at
the time of delivery the Products shall: (i) comply with all applicable federal,
state and local laws and regulations, including, without limitation, the FDCA
and the FTCA, including any and all laws, rules and regulations regarding the
labeling, warning and instructions to be placed upon or included with the
Products; (ii) not be adulterated or misbranded within the meaning of the FDCA;
(iii) not be an article which, under the provisions of Section 404 and 505 of
the FDCA, may not be introduced into interstate commerce; (iv) not be in
violation of the provisions of the Food Additives Amendment of 1958; and (v) be
in full compliance with California's Safe Drinking Water and Toxic Enforcement
Act of 1986, as amended from time to time, and all regulations promulgated
thereunder, and are Products which do not require any form of warning under such
act.

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        10.2 Inspection of Products. The Company shall inspect all of the
Products shipped to it promptly upon receipt thereof, and in no event later than
fifteen (15) days after receipt thereof. NAI warrants that the Products: (i)
will, when delivered, conform to the description on the face of the purchase
order relating to such Products; (ii) will be free of defects in materials and
workmanship; and (iii) will meet the Specifications. NAI shall, at the Company's
option, replace (F.O.B. the Company's point of destination) or issue a credit or
refund to the Company for any nonconforming Products provided, however, that the
Company furnishes to NAI written notice, in reasonable detail, of the
nonconformity of the Products within fifteen (15) days after the receipt thereof
by the Company, and the Company provides NAI with a reasonable opportunity to
inspect such goods and offers to return such goods to NAI at NAI's cost.

        10.3 Limitation. The warranty set forth in Section 10.1 hereof shall not
extend to the Company's customers or their customers, if any. NAI shall
indemnify, defend and hold the Company and its employees, agents,
representatives, directors, officers, members and shareholders harmless for,
from and against all liabilities, suits, actions, proceedings, claims, demands,
losses, damages, fees, taxes, costs, penalties and expenses including, but not
limited to, reasonable attorneys' and accountants' fees caused by, arising out
of or otherwise related to any defective Products or product liability claims
brought by any person or entity with respect to any Products manufactured for
the Company by NAI. NAI agrees to name the Company as an additional insured on
NAI's current insurance policy and maintain product liability coverage in an
amount of no less than Ten Million Dollars ($10,000,000), and NAI shall maintain
an additional Ten Million Dollars ($10,000,000) in excess product liability
coverage for the entire term of this Agreement.

        10.4 Standards. In connection with orders of Products hereunder, NAI
will formulate, manufacture and package the Products for the Company of the same
quality and with the same care as it uses for Products it produces for its
valued customers. NAI will not change the packaging or shipping of Products
hereunder without the Company's prior written consent except for minimum
deviations that do not affect the quality of the Products or legal compliance of
the labels, packaging and Product documentation.

        10.5 NO ADDITIONAL WARRANTIES. THE WARRANTIES SET FORTH HEREIN, AND ANY
ADDITIONAL WARRANTY EXPRESSLY STATED TO BE A WARRANTY AND SET FORTH IN WRITING
AS PART OF THESE TERMS HEREIN ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE.

        10.6 NO CONSEQUENTIAL DAMAGES. UNDER NO CIRCUMSTANCES SHALL NAI OR ANY
AFFILIATE OF NAI HAVE ANY LIABILITY WHATSOEVER FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES, such as, but not limited to, loss of profit or revenue; loss of use of
the Products; cost of capital; or claims resulting from contracts between the
Company, its customers and/or suppliers. Unless expressly provided for herein,
in no event shall NAI or any affiliate of NAI assume responsibility or liability
for (i) penalties, penalty clauses or liquidated damages clauses of any

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description, or (ii) indemnification of the Company or others for costs, damages
or expenses arising out of or related to the actions of the Company or its
distributors, agents, licensees, or customers.

        10.7 Labor Laws. NAI warrants and represents that NAI will comply with
all applicable labor and employment laws, including, without limitation, all
laws and regulations under the federal Occupational Safety Hazards Act (OSHA),
as amended.

        10.8 Cumulative Rights. The foregoing provisions are in addition to and
are not intended to limit or replace any of the Company's rights or NAI's duties
and obligations arising out of any other provision of this Agreement or any
other applicable law.

11.     Trademark: Proprietary Information

        11.1 Proprietary Assets. During the course of its performance of this
Agreement, NAI may, employing artwork, mechanical and packaging cylinders
furnished by the Company or FitnessAge, and in compliance with all applicable
laws, cause to be printed on the packaging materials and shipping containers of
the Products those trademarks and/or trade names that the Company or FitnessAge
may designate in writing from time to time. NAI will not use in any way, and
will not remove, alter or change in any way, any trademark, trade name, logo or
other commercial symbol of the Company or FitnessAge, without the prior
permission of the Company or FitnessAge. NAI agrees to execute any and all
consents or other documents that the Company or FitnessAge may deem reasonably
required in relation to NAI's use, display or reproduction of any trademark,
trade name, logo or other commercial symbol or designation belonging to the
Company or Fitness Age.

        11.2 Limited Use. Nothing set forth in this Agreement shall be construed
to grant to NAI any right to or interest in any trademark, trade name,
copyright, patent or know-how owned or asserted to be owned by FitnessAge or any
of its affiliates. NAI's use of such trademarks, trade names, copyrights,
patents or know-how shall be limited exclusively to its performance of this
Agreement and in accordance with any written consent reasonably required by the
Company and/or FitnessAge. NAI will exercise due care to protect the trade name,
trademarks and general goodwill of FitnessAge and refrain from any activities
detrimental thereto. NAI shall immediately cease any further use or display of
any intellectual property owned by the Company or FitnessAge if this Agreement
is terminated (even if such termination is determined to be wrongful) or the
owner of the intellectual property withdraws, resigns, or otherwise terminates
its relationship with the Company or with NAI. NAI recognizes that money damages
are not adequate to compensate Company or FitnessAge for any unauthorized use of
the intellectual property in violation of this Section 11, and consents to the
imposition of injunctive relief by any court or administrative body, including
without limitation, temporary protective orders, preliminary injunctions and
permanent injunctions, to prevent NAI from so using the intellectual property in
a manner contrary to the provisions of this Agreement.

        12.    Indemnification, Insurance

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        12.1 Indemnification NAI. NAI shall provide all proper safeguards and
shall assume all risks in its performance of this Agreement and shall indemnify
and save the Company (including its employees, agents, representatives,
directors, officers, members and shareholders) harmless from and against any and
all loss, liability, damages, claims for damages, suits, recoveries, judgements
or executions, including costs, expenses and reasonable attorneys' fees, that
may be claimed asserted or recovered against the Company by any person, firm or
corporation whatsoever or whomsoever, on account of any actual or alleged injury
to person or property or death occurring to any person whatsoever and arising
out of: (i) any obligation of NAI under this Agreement; (ii) any possession, use
of, or consumption by, any person of the Products supplied by NAI to the Company
under this Agreement; (iii) any actual or alleged injury to person or property
or death occurring to any of NAI's employees, agents or any individual on NAI's
premises; or (iv) any damages or loss caused by NAI's breach of any warranties
or representations made herein or any provision of this Agreement. In no event
shall NAI be required to indemnify the Company or any other person (other than
NAI) for any liability arising solely as a result of any statement or claim made
by such person with respect to Products.

        12.2 Indemnification Company. The Company shall provide all proper
safeguards and shall assume all risks in its performance of this Agreement and
shall indemnify, defend and hold harmless NAI, its subsidiaries, affiliated
and/or controlled companies and all sublicensees, as well as their respective
officers, directors, agents and employees, harmless from and against any and all
damage, loss, expense (including reasonable attorneys' fees and costs), award,
settlement or other obligation arising out of any claims, demands, actions,
suits or prosecutions that may be made or instituted against them or any of
them, arising out of: (i) any alleged breach of the Company's warranties as set
forth herein; (ii) any injury or death caused by the Company's breach of any
provision of this Agreement; and (iii) any misrepresentations or warranties
beyond those provided for herein made by the Company related to the marketing,
distribution, promotion, sale or use of Products.

        12.3 Insurance. NAI shall carry with companies reasonably satisfactory
to the Company: (i) Workers' Compensation and Employee's Liability Insurance;
(ii) Standard Form Fire and Extended Coverage Insurance for the full replacement
value of any of the Product or any premiums or packaging materials; and (iii)
Comprehensive General Liability Insurance including Contractual Liability and
Products Liability Coverage (with Broad Form Vendor's Endorsement naming the
Company and its authorized distributors, licensees and agents as additional
insureds) with a combined single limit of not less than Ten Million Dollars
($10,000,000). NAI shall submit policies and/or certificates of insurance
evidencing the above coverage (which shall include an agreement by the insurer
not to cancel or materially alter its coverage except upon thirty (30) days
prior written notice to the Company) to the Company within five (5) days after
execution of this Agreement. Products Liability Insurance shall continue in
effect for the Company's benefit for a period of one (1) year from the date of
the last delivery of Products to the Company. In case of NAI's failure to carry
said policies and/or furnish certificates of insurance or upon cancellation of
any required insurance, the Company may, at its option, immediately terminate
this Agreement unless (in the case of cancellation) NAI has obtained substitute
insurance coverage before such insurance becomes canceled and provides the
Company with satisfactory evidence thereof or the Company, at its option,
obtains equivalent insurance at a reasonable rate, the premiums for which will
be charged to NAI.

                                                                        11 of 19
<PAGE>   12

        13. Relationship of the Parties. NAI shall be deemed an independent
contractor with respect to the terms and provisions of this Agreement and it
shall not in any respect act as an agent, employee, partner or joint venturer of
the Company or of FitnessAge, except as specifically set forth in the Operating
Agreement of the Company. All persons employed in connection with the
manufacture and/or supply of the Products shall be employees or agents of NAI
and under no circumstances shall NAI or any of its employees or agents be deemed
to be employees or agents of the Company or of FitnessAge.

14.     Term of Agreement

        14.1 Term. This Agreement shall remain in effect for a period of ten
(10) years unless earlier terminated in accordance with this Section. Upon
expiration of the initial term, the term of this Agreement will automatically be
extended for successive one (1) year periods unless terminated by either party
by written notice delivered at least ninety (90) days prior to the expiration of
any such period in accordance with Section 17.1.

        14.2 Termination for Non-compliance. Either party may terminate this
Agreement prior to the end of its term only after notice to the other and only
if the other materially fails to comply with any covenant in this Agreement and
such failure continues for more than thirty (30) days after written notice
thereof from the other party, unless such failure cannot be cured within thirty
(30) days then only if the defaulting party fails to commence such cure within
thirty (30) days and diligently thereafter prosecute such cure to completion.
This paragraph 14.2 shall not affect the rights and obligations of the Parties
as set forth in Paragraph 4.2 above.

        14.3 Termination on Other Specific Events. Either party may terminate
this Agreement immediately only if:

               14.3.1 The other party dissolves, suspends or discontinues its
business operations, makes any assignment for the benefit of its creditors,
commences voluntary proceedings for liquidation in bankruptcy, admits in writing
its inability to pay its debts generally as they become due or consents to the
appointment of a receiver, trustee or liquidator of the other party or of all or
any material part of its property, or if there is an execution which applies to
a material portion of its assets.

               14.3.2 The other party shall commence any case, proceeding or
other action under any existing or future law of any jurisdiction, domestic or
foreign, relating to bankruptcy, insolvency, reorganization or relief of debtors
seeking to have an order for relief entered with respect to it, or seeking to
adjudicate it a bankrupt or insolvent, or seeking reorganization, arrangement,
adjustment, winding-up, liquidation, dissolution, composition or other relief
with respect to it or its debts.

               14.3.3 (A) There shall be commenced against the other party any
case, proceeding or other action of a nature referred to in clause 14.3.2 above
which results in the entry of an order for relief or any such adjudication or
appointment or remains undismissed, undischarged, unstayed or unbonded for
period of ninety (90) days; or (B) there shall be commenced against the other
party any case,

                                                                        12 of 19
<PAGE>   13

proceeding or other action seeking issuance of a warrant of attachment,
execution, distraint or similar process against all or any substantial part of
its assets, which results in the entry of an order for any such relief which
shall not have been vacated, discharged or stayed or bonded pending appeal
within ninety (90) days from the entry thereof; or (C) the other party shall
take any action in furtherance of, or indicating its consent to, approval of or
acquiescence in, any of the acts set forth in clause (A) or (B) above.

               14.3.4 A party to this Agreement assigns its rights to an
unrelated third person who is at the time of transfer involved as an adverse
party in material and adverse litigation against the other party to this
Agreement or its Affiliate.

               14.3.5 A party to this Agreement is in substantial breach of the
terms and conditions of this Agreement, including the expiration of any cure
period provided for herein.

        14.4 Duties on Termination. Upon termination of this Agreement, copies
of all records related to the Company shall be kept by NAI for a minimum of
three (3) years following production. In addition, NAI shall complete all work
in process in a timely fashion and deliver the same to the Company as provided
herein against payment as provided herein. The Parties shall cooperate and
utilize their best efforts to prepare such final reconciliations of Products and
amounts to be provided as between them in connection with such termination. Upon
termination of this Agreement, NAI shall immediately return to the Company and
FitnessAge all of such party's artwork and other materials containing such
party's trademarks, trade names, logos, brands, slogans, trade dress or other
intellectual property, and thereafter cease any further use thereof. The
obligations of the Parties with respect to Intellectual Property (Section 11),
Indemnity and Insurance (Section 12) and Confidentiality (Section 15) shall
survive the termination of this Agreement and remain fully enforceable.

15.     Confidentiality

        15.1 Duty to Protect Confidential Information. Any confidential
information disclosed or conveyed by any party to another in connection with its
business by written communication and marked as confidential, or by oral
communication and confirmed in writing to be confidential within thirty (30)
working days of oral disclosure, shall be treated by the receiving party as a
trade secret of the disclosing party and as confidential proprietary
information. The information disclosed shall be held in trust by the receiving
party for the benefit of the disclosing party. The receiving party shall treat
such information as confidential proprietary and/or trade secret information,
and shall take such steps to assure its continued confidentiality in like manner
as it would use to protect its own trade secrets or confidential information and
will not, except as required by law, disclose any such confidential information
received from the other party to any person unless such disclosure is approved
in writing by the disclosing party.

        15.2 Means of Protecting Confidential Information. NAI and the Company
agree to take reasonable steps to ensure the proprietary and confidential nature
of one another's confidential information and of the Plants, Products,
Specifications and Technical Information in which confidential

                                                                        13 of 19
<PAGE>   14

information is embodied or included and to protect the same form loss or theft
and agree to clearly mark such confidential information and properly indicate
its proprietary nature.

        15.3 Terms of Agreement. The Parties agree that the terms contained in
this Agreement are proprietary and confidential, as is the existence of this
Agreement. Other than as required by law, including NAI's compliance with the
1934 U.S. Securities and Exchange Act, each party agrees to maintain the
existence of this Agreement and the terms and information contained herein
strictly confidential and will not disclose any such information to any person
who is not a party hereto without the prior written consent of all Parties,
which consent may be granted or withheld in the absolute discretion of each
party.

        15.4 Plant, Products, Specifications and Technical Information. The
Parties agree that the Plant, Products, Specifications and Technical Information
pursuant to Sections 1.3, 1.4, 1.5 and 1.6 are proprietary and confidential and
are furnished only for the purpose of designing, researching, formulating,
developing, manufacturing and packaging the Nutritional Products for the
Company. Other than as required by law, including NAI's compliance with the 1934
U.S. Securities and Exchange Act, any other use of the information by the
Company is understood and agreed by the Parties to constitute a material breach
of this Agreement that cannot be cured.

        15.5 Audits. The Parties agree the information arising, created,
compiled or developed in connection with inspections and audits permitted
pursuant to Sections 6.2, 6.5, 7.3 and 8.1 are proprietary and confidential, and
the information revealed therein is furnished only for the purpose of confirming
compliance with the terms of this Agreement. Any other use of the information
revealed by such inspections or audits is understood and agreed by the Parties
to constitute a material breach of this Agreement that cannot be cured.

        15.6 Extended Term of Confidentiality. It is recognized by all Parties
that due to their respective positions of confidence giving rise to access to
confidential, proprietary information during the term of this Agreement, that
the provisions of this Section 15 apply during the term of this Agreement and
for a period of three (3) years thereafter.

        15.7 Provisions Divisible. It is agreed by all Parties that the
foregoing covenants are appropriate and reasonable in light of the nature and
extent of the business conducted by the Parties and their respective
relationships. It is further agreed that the covenants set forth herein are
divisible in the event they are held to be invalid, unreasonable, arbitrary or
against public policy. Further, it is agreed by the Parties that if any court of
competent jurisdiction makes such a determination, the court may determine what
time period and geographical area are reasonably necessary to protect the
Parties' legitimate business interests and which are enforceable. Nothing
contained in this Agreement shall be construed or interpreted to prevent the
Parties hereto from using such confidential information in any dispute between
themselves, so long as reasonable care is taken to implement a protective order
to prevent such confidential information from being disclosed to unnecessary
third Parties.

                                                                        14 of 19
<PAGE>   15

        15.8 Irreparable Injury. Each party acknowledges that damages at law
will be an insufficient remedy for violation of the terms of this Article and
that the other Parties would suffer irreparable injury as a result of such
violation. Accordingly, it is agreed the Parties may obtain injunctive relief to
enforce the provisions of this Article of this Agreement, which injunctive
relief shall be in addition to any other rights or remedies available to it or
them.

16.     Applicable Law

        16.1 Law. This Agreement shall be construed in accordance with the laws
of the State of California, without regard to its rules on conflicts of law.

        16.2 Venue. Subject to the obligation to arbitrate disputes set forth
herein any action or proceeding seeking to enforce any provision of, or based on
any right arising out of, this Agreement may be brought against any of the
Parties only in the courts of the State of California, County of San Diego, or,
if it has or can acquire jurisdiction, in the United States District Court for
the Southern District of California, and each of the Parties consents to such
venue and to the jurisdiction of such courts (and of the appropriate appellate
courts) in any such action or proceeding and waives any objection to venue laid
therein. Process in any action or proceeding referred to in the preceding
sentence may be served on any party anywhere in the world.

        16.3 Arbitration. Any dispute, controversy or claim arising from, out of
or in connection with, or relating to, this Agreement or any breach or alleged
breach of this Agreement, except allegations of violations of Federal or State
securities laws, will upon the request of any party involved be submitted to the
Judicial Arbitration and Mediation Service or any other private arbitration
service utilizing former judges as mediators and approved by the Parties. The
dispute once submitted shall be resolved by arbitration in the County of San
Diego, California (or at any other place or under any other form of arbitration
mutually acceptable to Parties involved). The arbitrator shall follow and apply
the California Evidence Code in the conduct of the arbitration, and the Parties
shall be entitled to discovery in accordance with the provisions of the
California Code of Civil Procedure. Any award rendered shall be final, binding
and conclusive upon the Parties and shall be non-appealable, and a judgment
thereon may be entered in the highest State or Federal court of the forum,
having jurisdiction. The expenses of the arbitration shall be borne equally by
the Parties to the arbitration, provided that each party shall pay for and bear
the cost of its own experts, evidence and attorneys' fees, except that in the
discretion of the arbitrator, any award may include the costs, fees and expenses
of a party's attorneys. Neither this Section 16.3 nor this arbitration provision
shall preclude any party to this Agreement from seeking and obtaining
enforcement of this arbitration provision from a court of competent jurisdiction
or from seeking and obtaining equitable relief, including injunctive relief, to
enforce the terms and conditions of the sections of this Agreement which relate
to Intellectual Property (Section 11), Indemnity (Section 12) and
Confidentiality (Section 15).

        16.4 Attorneys Fees. If any arbitration or legal proceeding is brought
for the enforcement of this Agreement, or because of an alleged breach, default
or misrepresentation in connection with any provision of this Agreement or other
dispute concerning this Agreement, the successful or prevailing

                                                                        15 of 19
<PAGE>   16

party shall be entitled to recover reasonable attorneys fees incurred in
connection with such arbitration or legal proceeding. The term "prevailing
party" shall mean the party which is entitled to recover its costs in the
proceeding under applicable law, or the party designated as such by the court or
the arbitrator.

17.     Notice; Designation

        17.1 Notices. Unless otherwise indicated herein, all notices, requests,
demands or other communication sot the respective Parties hereto shall be deemed
to have been given or made when deposited in the mails, registered or certified
mail, return receipt requested, postage prepaid, or by means of overnight
delivery service when delivered to such service addressed to the respective
party at the following address:

               If to NAI:

               Natural Alternatives International, Inc.
               1185 Linda Vista Drive
               San Marcos, California 92069
               Attention: Mark LeDoux, Chief Executive Officer
               Telephone: (760) 744-7340
               Facsimile: (760) 591-9637

               with a copy to:

               Natural Alternatives International, Inc.
               1185 Linda Vista Drive
               San Marcos, California 92069
               Attention:  David Lough, Executive Vice President
               Telephone: (760) 744-7340
               Facsimile: (760) 591-9637

               and with an additional copy to:

               Fisher Thurber LLP
               4225 Executive Square, Suite 1600
               La Jolla, California 92037
               Attention: David A. Fisher
               Telephone: (858) 535-9400
               Facsimile: (858) 535-1616

                                                                        16 of 19
<PAGE>   17

               If to Company:

               FitnessAge Nutrition, LLC
               4250 Executive Square, Suite 101
               La Jolla, CA 92037
               Attention: Michael L. Jeub
               Telephone: (858) 625-4222
               Facsimile: (858) 625-4200

               with a copy to:

               Barnhorst, Schreiner & Goonan
               550 West "C" Street, Suite 1350
               San Diego, CA 92101
               Telephone: (619) 544-0900
               Facsimile: (619) 544-0703
               Attention: Brian W. DeWitt, Esq.

        17.2 Designated Contact. If a specific contact person is designated in a
provision, notice concerning the subject matter of such provision shall be
directed to such person. The address or the name of any party or contact person
may be changed by sending notice in the manner set forth above.

18.     Successors, Assignment. This Agreement shall inure to the benefit of and
be binding upon the successors and permitted assigns of the Parties. NAI and the
Company may assign their rights and obligations under this Agreement to their
Affiliate. Any such assignment will not release or discharge them from any
liability or obligation hereunder. The rights and obligations of the Company and
NAI may only be assigned after first obtaining the other party's written
consent, which consent may not be unreasonably withheld. As used herein,
Affiliate shall refer to any person or entity that is under direct or indirect
control of the applicable party. The term "control" includes without limitation,
ownership of interest representing a majority of the total voting power in an
entity or the ability to manage or direct such entity.

19.     Modification, Severability

        19.1 Modification. Neither this Agreement nor any part hereof may be
changed, altered or amended orally. Any modification must be by written
instrument signed by the party against whom enforcement of the change,
alteration or amendment is sought.

        19.2 Severability. If any provisions of the Agreement is held
ineffective for any reason, the other provisions shall remain effective.

20.     Further Assurances. The Parties agree (a) to furnish upon request to
each other such further information, (b) to execute and deliver to each other
such other documents, and (c) to do such other acts

                                                                        17 of 19
<PAGE>   18

and things, all as the other party may reasonably request for the purpose of
carrying out the intent of this Agreement and the documents referred to in this
Agreement.

21.     Waiver. The rights and remedies of the Parties to this Agreement are
cumulative and not alternative. Neither the failure nor any delay by any party
in exercising any right, power or privilege under this Agreement or the
documents referred to in this Agreement will operate as a waiver of such right,
power or privilege, and no single or partial exercise of any such right, power
or privilege will preclude any other or further exercise of such right, power or
privilege or the exercise of any other right, power or privilege. To the maximum
extent permitted by applicable law, (a) no claim or right arising out of this
Agreement or the documents referred to in this Agreement can be discharged by
one party, in whole or in part, by a waiver or renunciation of the claim or
right unless in writing signed by the other party; (b) no waiver that may be
given by a party will be applicable except in the specific instance for which it
is given; and (c) no notice to or demand on one party will be deemed to be a
waiver of any obligation of such party or of the right of the party giving such
notice or demand to take further action without notice or demand as provided in
this Agreement or the documents referred to in this Agreement.

22.     Entire Agreement. This Agreement supersedes all prior agreements between
the Parties with respect to its subject matter and, together with the Operating
Agreement of the Company and its Exhibits, constitutes a complete and exclusive
statement of the terms of the agreement between the Parties with respect to its
subject matter.

23.     Section Headings, Construction. The headings of Sections in this
Agreement are provided for convenience only and will not affect its construction
or interpretation. All references to "Section" or "Sections" refer to the
corresponding Section or Sections of this Agreement. All words used in this
Agreement will be construed to be of such gender or number as the circumstances
require. Unless otherwise expressly provided, the word "including" does not
limit the preceding words or terms.

24.     Time of Essence. With regard to all dates and time periods set forth or
referred to in this Agreement, time is of the essence.

25.     Severability of Provisions. Each provision of this Agreement shall be
considered severable, and if for any reason any provision which is not essential
to effect the basic purposes of this Agreement is determined to be invalid and
contrary to any existing or future law, then such invalidity shall not impair
the operation of or affect those provisions of this Agreement which are valid.

26.     Saving Clause. If and to the extent any provision of this Agreement is,
or is found by an arbitrator or court of competent jurisdiction to be,
prohibited under, contrary to or ineffective under any existing or future law,
this Agreement shall be considered amended to the smallest degree necessary to
make this Agreement conform to such law and effective thereunder.

27.     Counterparts. This Agreement may be executed in one or more
counterparts, each of which will be deemed to be an original copy of this
Agreement and all of which, when taken together, will be deemed to constitute
one and the same agreement.

                                                                        18 of 19
<PAGE>   19

28.     Conflicts. Each party represents and warrants to the other that neither
the execution and delivery of this Agreement nor the consummation of the
transactions contemplated hereunder will violate or constitute a default under
any agreement or instrument previously entered into by any party by which any
party is bound.

29.     Force Majeure. No party shall be liable to any other for its failure to
timely perform any such obligations such as a result of fire, flood, epidemic,
earthquake, explosion, accident, labor dispute or strike, an act of God or
public enemy, riot or civil disturbance, war (whether declared or undeclared) or
armed conflict, inability to obtain personnel or facilities, failure of common
carrier, any municipal ordinance, any state or federal law, governmental order
or regulation, or order of any court of competent jurisdiction, or any other
similar event or occurrence not within the control of the defaulting party, as
the case may be.

        IN WITNESS WHEREOF, the Parties hereto have duly executed this
Manufacturing Agreement as of the day and year first above written.

        NATURAL ALTERNATIVES INTERNATIONAL, INC.,
        a Delaware corporation

        By:      /s/ Mark LeDoux
           ------------------------------------
           Mark LeDoux, Chief Executive Officer

        CUSTOM NUTRITION, LLC, a Delaware limited liability company By its
        Members:

        FitnessAge Incorporated
        a Nevada corporation

        By:      /s/ Michael L. Jeub
           ------------------------------------
           Michael L. Jeub, President

        NATURAL ALTERNATIVES INTERNATIONAL, INC.,
        a Delaware corporation

        By:      /s/ Mark LeDoux
           ------------------------------------
           Mark LeDoux, Chief Executive Officer

                                                                        19 of 19<PAGE>   1
                                                                    EXHIBIT 10.3

                                 LOAN AGREEMENT

        This loan agreement ("Agreement") is entered into as of November 11,
1999, by and between FitnessAge, Inc., a Nevada corporation ("Corporation"), and
Natural Alternatives International, Inc., a Delaware corporation ("Lender").
Borrower and Lender agree as follows:

SECTION 1.     LOAN TO THE CORPORATION

        Subject to the terms and conditions of this Agreement and in reliance
upon the representations and warranties made in this Agreement by the
Corporation, the Lender agrees to lend to the Corporation the aggregate amount
of up to $750,000 consisting of $400,000 to be funded concurrently with the
execution hereof and $350,000 to be funded on or about November 23, 1999,
subject to the terms and conditions set forth herein. The loans made pursuant to
this Loan Agreement ("Loan") shall be evidenced by Convertible Secured
Promissory Notes in the form attached hereto and incorporated herein by this
reference ("Notes").

SECTION 2.     SECURITY

        As security for the performance and payment of all obligations and
indebtedness of the Corporation to the Lender, the Corporation agrees that at
all times prior to the performance and payment of all such obligations and
indebtedness, the Lender shall have a perfected security interest, superior to
all other liens in all the rights, title, and interest of the Corporation in
Custom Nutrition, LLC, a Delaware limited liability company, including, without
limitation, rights held by the Corporation as a member, manager or creditor of
Custom Nutrition, LLC, as well as the allocable interest of the Corporation in
any amount received by Custom Nutrition, LLC from Bally Total Fitness Holding
Corporation or its affiliates, whether such interests are now owned or hereafter
acquired and wherever the same may be located, and shall include the proceeds,
products, and accessories of any kind to any thereof. The interests described
above are referred to herein as the "Collateral". In this connection, the
Corporation has executed and delivered to the Lender concurrently herewith the
Security Agreement attached hereto and incorporated herein by this reference
("Security Agreement").

SECTION 3.     THE BORROWING

        3.1 Initial Loan Funding. Upon execution of this Agreement, the Note and
Security Agreement and receipt of signed Articles of Formation and authorization
to file for Custom Nutrition, LLC, Lender shall deliver to the Corporation funds
in the amount of $400,000.

        3.2 Subsequent Loan Funding. Upon the later of (i) November 23, 1999 or
(ii) satisfaction or waiver by the Lender of each of the conditions set forth in
Section 9 of this Agreement, the Lender shall deliver to the Corporation funds
in the amount of $350,000, less expenses of Lender including its legal fees
incurred in connection herewith. If the conditions set forth in Section 9 of
this Agreement are not satisfied, or waived by Lender (in its sole discretion)
by

                                       1
<PAGE>   2

December 1, 1999, the amounts due under the Note(s) shall be all due and payable
and the Corporation shall be in default of this Agreement.

SECTION 4.     REPRESENTATIONS AND WARRANTIES OF THE CORPORATION

        The Corporation represents and warrants to the Lender as follows:

        4.1 Due Organization. The Corporation is a corporation duly organized,
legally existing, and in good standing under the laws of Nevada and is duly
qualified as a foreign corporation in all jurisdictions in which it is required
to be so qualified. The Corporation has no active subsidiaries.

        4.2 Capital Stock. The outstanding Securities of the Corporation have
been duly authorized, validly issued, and are fully paid and nonassessable.
Except for 6,182,000 shares of Common Stock reserved for issuance to employees,
consultants and directors pursuant to outstanding options; 5,002,916 shares of
Common Stock are reserved for issuance to employees, consultants and directors
pursuant to outstanding warrants, 6,000,000 shares of Common Stock reserved for
issuance pursuant to the pending private placement of Common Stock at $0.75 per
share, and a proposed 1,000,000 share issuance pursuant to an asset purchase,
there are no existing warrants, options, conversion rights, calls, or
commitments of any character pursuant to which the Corporation is or may become
obligated to issue or repurchase any shares of capital stock or other securities
other than pursuant to the various transactions undertaken between the
Corporation and Lender of even date herewith. No shareholder of the Corporation
has any preemptive right to acquire any securities of the Corporation. The
Corporation has repurchased none of its outstanding capital stock.

        4.3 Corporate Authorization. The Corporation is duly authorized and
empowered to create, issue, and deliver the Note, this Loan Agreement, and the
Security Agreement. The Corporation has all corporate authority necessary to
execute and deliver this Agreement and all other instruments referred to or
mentioned in this Agreement to which the Corporation is a party, and all
corporate action requisite for the due creation, issuance, and delivery of the
Note, the due execution and delivery of this Agreement and the Security
Agreement has been duly and effectively taken. This Agreement, the Note, the
Security Agreement, and all other instruments referred to or mentioned in this
Agreement or in the Note, or the Security Agreement to which the Corporation is
a party are, or when executed and delivered will be, the valid and binding
obligations of the Corporation enforceable in accordance with their terms. The
Loan is convertible into Common Stock in accordance with the terms of the Note,
and the shares of Common Stock initially issuable upon conversion of the Loan
have been, and any additional shares of Common Stock which hereafter may be so
issuable shall be, duly authorized and reserved for issuance upon such
conversion or exercise, are not and shall not be subject to preemptive rights,
and, when issued upon such conversion or exercise in accordance with the terms
of this Agreement or the Note, will be duly issued, fully paid, and
nonassessable.

                                       2
<PAGE>   3

        4.4 No Default. This Agreement, the Note, and the Security Agreement,
and the transactions contemplated under each, do not violate any provisions of
the Corporation's articles of incorporation or bylaws, or any contract,
agreement, law, or regulation to which the Corporation or any of its properties
is party or subject, and the same do not require the consent or approval of any
regulatory authority or governmental body of the United States or of any state
or subdivision thereof or of any other person, except as set forth in or
contemplated by this Agreement or the Security Agreement.

        4.5 Litigation and Other Matters. As of the date of this Agreement,
there is no litigation or any other action or proceeding of any nature pending
or, to the knowledge of the Corporation, threatened against or affecting the
Corporation that involves the possibility of any judgment or liability not fully
covered by insurance, or that may adversely affect the business, financial
position, or assets of the Corporation or its ability to carry on business as
now conducted. The Corporation is not a party to any indenture, loan, or credit
agreement or any lease or other agreement or instrument or subject to any
charter or corporate restriction that could have a material adverse effect on
the business, financial condition, or assets of the Corporation, or on the
ability of the Corporation to carry out its obligations under this Agreement,
the Note, and the Security Agreement.

        4.6 Title to Collateral. The Corporation has good and marketable title
to the Collateral, free and clear of all mortgages, liens, and encumbrances,
other than those created by the Security Agreement.

        4.7 Compliance With Laws. The Corporation has substantially complied
with all laws, regulations, ordinances, franchises, licenses, and orders
applicable to the Corporation, its assets or its business as currently
conducted.

        4.8 Governmental Licenses. The Corporation has all governmental
licenses, permits, and other governmental authorizations currently necessary for
the conduct of its business, and such licenses, permits, and authorizations are
in full force and effect and have been and are now being fully complied with by
the Corporation.

        4.9 Security Interests. The Security Agreement creates and grants to the
Lender a legal, valid, and enforceable security interest in the Collateral. The
Collateral is not subject to any other liens or security interests whatsoever.

        4.10 Reliance by the Lender. The foregoing representations and
warranties are made by the Corporation with the knowledge and understanding that
the Lender is placing complete reliance on such representations and warranties
and is thereby induced to enter into this Agreement and consummate the
transactions contemplated by this Agreement.

                                       3
<PAGE>   4

SECTION 5.     REPRESENTATIONS OF THE LENDER

        5.1 Purchase for Investment. The Lender hereby represents and warrants
to and agrees with the Corporation that the Note is being acquired by the Lender
for its own account for investment and not with a view to, or for resale in
connection with, the distribution thereof, nor with any intention of
distributing or selling the Note, or the Common Stock into which the Loan is
convertible pursuant to the terms of the Note ("Conversion Shares"). If the
Lender should in the future decide to dispose of the Note, or any of the
Conversion Shares, the Lender understands and agrees that the Lender may do so
only in accordance with Rule 144 under the Securities Act of 1933 (Act) or
otherwise in compliance with the Act, as then in effect. If the Lender should
decide to dispose of the Note, or any of the Conversion Shares (other than
Conversion Shares that have been registered under the Act), the Lender will, at
the Lender's expense, designate counsel in connection with such disposition,
which may be the Corporation's outside counsel or other outside counsel of the
Lender reasonably acceptable to the Corporation, who shall provide an opinion to
the Corporation as to whether the proposed sale or other distribution of the
Note, or any of the Conversion Shares would require registration under the Act
as then in effect. If the opinion of such counsel is to the effect that the
proposed sale or other distribution does not require any registration under the
Act as then in effect, the Lender shall be entitled to complete such sale or
other disposition. If the opinion of such counsel is to the effect that the
proposed sale or other disposition requires registration, such sale or other
disposition may not be made unless such registration is duly completed in
accordance with the opinion of such counsel.

        5.2 Accredited Investor. The Lender is an "accredited investor," as that
term is defined in Rule 501, Regulation D promulgated by the Securities and
Exchange Commission ("SEC") under the Act.

        5.3 No Violations. This Agreement, the Note, and the Security Agreement
and the transactions contemplated under each do not violate any provisions of
the Lender's articles of incorporation or bylaws, or any contract, agreement,
law or regulation to which the Lender or any of its properties is party or
subject and the same do not require the consent or approval of any regulatory
authority or governmental body of the United States or of any state or
subdivision thereof or of any other person, except as set forth in or
contemplated by the Loan Agreement or the Security Agreement.

SECTION 6.     AFFIRMATIVE COVENANTS

        The Corporation covenants and agrees as set forth below until the
earlier of: (i) the principal and interest due on the Notes have been paid in
full; or (ii) the effective date of an initial public offering of its Common
Stock pursuant to a registration statement filed under the Securities Act of
1933.

                                       4
<PAGE>   5

        6.1 Financial Statements. The Corporation will promptly furnish to the
Lender from time to time upon request the following information regarding the
business affairs and financial condition of the Corporation:

               6.1.1 Annual Statements. As soon as available and in any event
        within 90 days after the end of each fiscal year of the Corporation
        (being December 31 in each calendar year), balance sheets and statements
        of income and cash flows of the Corporation and its consolidated
        subsidiaries on a consolidated and consolidating basis, commencing with
        the fiscal year 1999, such year-end financial reports to be prepared in
        accordance with generally accepted accounting principles ("GAAP") and
        audited and certified by independent public accountants.

               6.1.2 Quarterly Statements. Within 45 days after the end of each
        fiscal quarter, unaudited balance sheets and statements of income and
        cash flows showing the financial condition and results of operations and
        changes in financial position of the Corporation and its consolidated
        subsidiaries on a consolidated basis as of the end of each such quarter,
        together with an instrument executed by the Chief Financial Officer or
        President of the Corporation certifying that such financial reports were
        prepared in accordance with GAAP consistently applied with prior
        practices for earlier periods (with the exception of footnotes that may
        be required by GAAP) and fairly present the financial condition of the
        Corporation and its results of operation for the periods specified,
        subject to year-end adjustments.

               6.1.3 Government Reports. Promptly after the same become publicly
        available, copies of such registration statements, annual, periodic, and
        other reports, and such proxy statements and other information, if any,
        as shall be filed by the Corporation or any of its subsidiaries with the
        SEC pursuant to the requirements of the Act or the Securities Exchange
        Act of 1934, as amended, and within five days after the same are filed,
        copies of all financial statements and material reports which the
        Corporation and its subsidiaries may make to, or file with, any federal
        or state authority; provided, that the Corporation shall consult with
        the Lender prior to the filing of any report with the SEC that discloses
        or describes the existence or terms of this Agreement or any other
        agreement or instrument contemplated in this Agreement, and shall grant
        the Lender a reasonable opportunity to review and comment on any such
        report.

               6.1.4 Asset Schedule. Within 90 days following the last day of
        the Corporation's fiscal year, and at such other time as it may be
        requested, a schedule of the Corporation's fixed assets and other major
        assets delineated by major asset category, indicating cost, accumulated
        depreciation, net depreciated value, and any mortgage, lien, or
        encumbrance upon such property, the terms of repayment of any
        indebtedness secured by such mortgage, lien or encumbrance, and all
        other indebtedness of the Corporation and the name of any creditor to
        whom repayment is to be made.

                                       5
<PAGE>   6

               6.1.5 Other Information. Such other information as the Lender may
        reasonably request from time to time.

        6.2 Taxes and Other Liens. The Corporation will comply with all statutes
and governmental regulations and will pay all taxes, assessments, governmental
charges, claims for labor, supplies, rent, and other obligations which if
unpaid, might become a lien against the property of the Corporation except
liabilities being contested in good faith and against which the Corporation will
set up and maintain reserves in accordance with generally acceptable accounting
principles.

        6.3 Maintenance. The Corporation will maintain its corporate existence
and comply with all valid and applicable statutes, rules, and regulations, and
the Corporation will maintain or cause to be maintained without diminution
thereof, its rights and interests comprising the Collateral, as defined in the
Security Agreement.

        6.4 Further Assurances. The Corporation promptly will cure any defects
in the execution and delivery of this Agreement and any other instrument or
instruments referred to or mentioned in this Agreement, and will immediately
execute and deliver to the Lender upon request any instrument required to
accomplish or satisfy the Corporation's covenants and agreements under this
Agreement or instruments referred to or mentioned in this Agreement.

        6.5 Performance of Obligations. On each funding of the Loan, the
Corporation will pay the fees and expenses incurred by the Lender in connection
with this Agreement and all transactions pursuant to or leading to this
Agreement, such fees and expenses to be set forth in a schedule to be delivered
by the Lender to the Corporation concurrently with such funding and may be
withheld by Lender from funding. The Corporation will pay for all amounts
expended, advanced, or incurred by the Lender to satisfy any obligation of the
Corporation under this Agreement or the Security Agreement, or to protect the
properties, assets, or business of the Corporation, or to collect the Note, or
to enforce the rights of the Lender under this Agreement, the Security
Agreement, or any other instrument referred to or mentioned in this Agreement or
the Security Agreement or executed or to be executed in connection with such
agreements, which amounts will include all court costs, attorneys' fees, fees of
auditors and accountants, and investigation expenses reasonably incurred by the
Lender in connection with any such matters, together with interest at the rate
of 10% per annum on each such amount from the date that the same is expended,
advanced, or incurred by the Lender until the date it is repaid to the Lender.

        6.6 Use of Funds. The Corporation shall use the proceeds of the Loan
only for those general corporate purposes that are not expressly prohibited
under this Agreement, to pay the fees and expenses of the Lender as provided by
Section 6.5 of this Agreement, which amount shall be paid on each funding date
out of the proceeds of the Loan. Upon funding of the loan amount described in
Section 3.2, not less than $150,000 of the proceeds thereof shall be delivered
to Custom Nutrition, LLC as a capital contribution on behalf of the Corporation.

                                       6
<PAGE>   7

        6.7 Director. Corporation shall cause to be elected to its Board of
Directors an individual designated by Lender in writing concurrently with the
execution hereof and shall maintain, at all times, such Director or a successor
as may be designated by Lender from time to time for the period of time equal to
the earlier of: (i) the Initial Offering of its Common Stock, or (ii) until no
amount remains outstanding under this Loan or the Notes. The Corporation shall
have the right to approve any individual designated by the Lender to be a member
of the Corporation's Board of Directors, and the Corporation's approval shall
not be unreasonably withheld.

        6.8 Operation of Custom Nutrition, LLC. During the term of the Loan,
Corporation will take all action necessary or appropriate in connection with the
operation of Custom Nutrition, LLC to cause the treatment by Custom Nutrition,
LLC of 40% of all amounts received by Custom Nutrition, LLC from Bally Total
Fitness Holding Corporation or its affiliates to be paid to Lender as
consideration for its entering into the Loan. The Corporation agrees to cause
the remaining 60% of such payments to be deposited in an escrow account of
Custom Nutrition, LLC for the benefit of Lender to be held as additional
Collateral for the performance of the terms of this Agreement, the Security
Notes and the Security Agreement. Said 60% of such payments shall be remitted to
Corporation when the Loan is repaid.

SECTION 7.     NEGATIVE COVENANTS

        A deviation from the provisions of this Section 7 shall not constitute
an Event of Default under this Agreement if such deviation is consented to in
writing (in the manner hereinafter provided) by the Lender. In the absence of
such a written consent, so long as any part of the principal or interest on the
Notes shall remain unpaid or not converted, the Corporation will not undertake
any of the following actions:

        7.1 Dividends. The Corporation will not declare or pay any dividend or
make any other distribution on account of the Common Stock or Preferred Stock of
the Corporation, or purchase, acquire, redeem, or retire any capital stock of
the Corporation, whether now or hereafter outstanding, other than as required by
the terms of the Preferred Stock currently issued and outstanding; provided,
that if no Event of Default has occurred and is continuing, then the Corporation
may declare and pay dividends and make distributions with respect to Preferred
Stock, whether now or hereafter outstanding; and provided, further, that if an
Event of Default has occurred and is continuing, then the Corporation (a) may
declare and pay dividends on Preferred Stock now issued and outstanding only in
shares of Common Stock, and may pay cash dividends only on such Preferred Stock
now issued and outstanding only if the holders thereof exercise their rights to
require cash dividends in accordance with the terms of such Preferred Stock and
(b) in addition to clause (a) above, may declare and pay dividends on Preferred
Stock now or hereafter issued and outstanding, in cash or in shares of Common
Stock, only if the Corporation has net earnings (as defined under generally
accepted accounting principles) at least equal to the value of such dividend.

        7.2 Loans, Advances and Investments. Except for the transactions
contemplated hereby for Custom Nutrition LLC, and except where the Company will
be involved in transactions

                                       7
<PAGE>   8

involving a simultaneous closing, wherein the Company receives more money from
an investment in the Company than it makes in the other party to the
transaction, Corporation will not make loans or advances to, or make any
investments in, any company, person, or entity except expense advances, and
special purpose loans to finance the exercise of stock options, made to
employees of the Corporation, and investments in and advances to wholly-owned
subsidiaries of the Corporation that guarantee the Corporation's obligations
hereunder to the extent of such investments and advances.

        7.3 Mergers. The Corporation will not merge or consolidate with any
corporation.

        7.4 Sale of Assets. The Corporation will not sell, transfer, or
otherwise dispose of all or substantially all of its assets.

SECTION 8.     EVENTS OF DEFAULT

        8.1 Events. Any of the following events shall be considered an Event of
Default as that term is used in this Agreement:

               8.1.1 Note Payments. Default shall be made in the payment of any
        installment of principal or interest on the Notes when due.

               8.1.2 Failure of Condition Precedent. The failure of any
        condition precedent set forth in Section 9 on or before November 23,
        1999, or such extended date as the parties may agree upon in writing.

               8.1.3 Other Indebtedness. Except for the $1.6 million
        indebtedness to the Corporation's founders due December 31, 1999, and
        indebtedness which in the aggregate does not exceed $100,000, default
        shall be made in the payment when due, whether by acceleration or
        otherwise, of all or any part of any other indebtedness of the
        Corporation, or a nonpayment default shall be made with respect to any
        other indebtedness of the Corporation (other than defaults that may
        reasonably be expected to be cured within any applicable grace period
        provided therefor) if the effect of any such default shall be to
        accelerate, or to permit (with the giving of notice or the passage of
        time or both) the holder or obligee of any indebtedness at its option,
        to accelerate the maturity of such indebtedness.

               8.1.4 Furnishing Information. The Corporation shall fail or
        refuse, after being requested to do so by the Lender, for a period of 30
        days to furnish to the Lender any information, data, certificate, or
        other document required by this Agreement or the Security Agreement.

               8.1.5 Other Defaults. Default shall be made in the due observance
        or performance of any covenant or agreement or provision contained in
        this Agreement, the Security Agreement or the Note to be performed by
        the Corporation (other than with respect to

                                       8
<PAGE>   9

        payment on the Note) and such default shall be continuing for a period
        of 10 days after notice by the Lender to the Corporation of such
        default.

               8.1.6 Representations and Warranties. Any representation or
        warranty made by the Corporation in this Agreement or in the Security
        Agreement proves to have been untrue in any material respect as of the
        date thereof, or any representation, statement (including financial
        statements), certificate, or data furnished or made by the Corporation
        (or any officer, accountant, or attorney of the Corporation) under this
        Agreement or under the Security Agreement proves to have been untrue in
        any material respect, as of the date which the facts therein set forth
        were stated or certified.

               8.1.7 Financial Distress. The Corporation shall (a) discontinue
        business; (b) make a general assignment for the benefit or creditors;
        (c) apply for or consent to the appointment of a receiver, a trustee, or
        liquidator of itself or of all or a substantial part of its assets; (d)
        be adjudicated a bankrupt or insolvent; (e) file a voluntary petition in
        bankruptcy or file a petition or answer seeking reorganization or an
        arrangement with creditors or seeking to take advantage of any other law
        (whether federal or state) relating to relief of debtors, or admit (by
        answer by default or otherwise) the material allegations of a petition
        filed against it in any bankruptcy, reorganization, arrangement,
        insolvency, or other proceeding (whether federal or state) relating to
        relief or debtors; (f) there shall have been entered any judgment,
        decree, or order entered by a court of competent jurisdiction that
        approves a petition seeking reorganization of the Corporation or
        appoints a receiver, trustee, or liquidator of the Corporation or of all
        or a substantial part of its assets; or (g) the Board of Director of the
        Corporation takes or omits to take any action for the purpose or with
        the result of effecting or permitting any of the foregoing.

        8.2    Remedies.

               8.2.1 General Remedies. Upon the happening of any Event of
        Default specified in Section 8.1 (other than an event described in
        Section 8.1.6), and at any time thereafter during the continuance of
        such event, the Lender may, upon written notice to the Corporation (a)
        declare the entire principal amount of the Note then outstanding and the
        interest accrued thereon immediately due and payable in cash without
        further notice and without presentment, demand, protest, notice of
        protest, or other notice of default or dishonor of any kind, all of
        which are expressly waived by the Corporation and (b) exercise any and
        all such other rights of a secured creditor under Article 9 of the
        Uniform Commercial Code with respect to the Collateral (as defined in
        the Security Agreement) and all rights granted the Lender under the
        Security Agreement.

               8.2.2 Financial Distress. With respect to a default described in
        Section 8.1.6 hereof, the Note and any unpaid accrued liabilities of the
        Corporation owing to the Lender shall automatically become due and
        payable, both as to principal and interest, without

                                       9
<PAGE>   10

        presentment, demand, protest, or other notice of any kind, all of which
        are hereby waived by the Corporation.

SECTION 9.   CONDITIONS PRECEDENT TO THE LENDER'S SUBSEQUENT FUNDING OBLIGATIONS

        The obligations of the Lender to loan $350,000 to the Corporation on
November 23, 1999, shall be subject to the satisfaction at or prior to the date
of such subsequent funding of the Loan of the following conditions:

        9.1. Representations and Warranties True. The representations and
warranties made by the Corporation in this Agreement shall be true on and as of
such date with the same effect as though such representations and warranties had
been made or given on and as of such date.

        9.2 Compliance With Agreement. The Corporation shall have performed and
complied with all of its obligations under this Agreement, the Note and the
Security Agreement, which are to be performed or complied with by the
Corporation prior to or on the date of such subsequent funding, and there shall
exist no condition or event constituting an Event of Default under this
Agreement or an event of default in any indebtedness of the Corporation or
which, after notice or lapse of time, or both would constitute such an event of
default.

        9.3 No Litigation. No investigation, suit, action, or other proceeding
shall be threatened or pending before any court or governmental agency which, in
the opinion of counsel for the Lender, is likely to result in the restraint,
prohibition or the obtaining of damages or other relief in connection with this
Agreement or the consummation of the transactions contemplated by this
Agreement, or in connection with any undisclosed claims against the Corporation.

        9.4 Statutory Requirements. The issuance and delivery of the Note and
the Security Agreement in the manner contemplated by this Agreement shall have
been duly and validly authorized and approved by the Board of Directors of the
Corporation, and the Corporation shall have delivered to the Lender evidence of
such authorization and approval and of compliance with any other statutory
requirements for the valid consummation by Corporation of the transactions
contemplated by this Agreement.

        9.5 Deliveries by the Corporation. The Corporation shall have delivered
to the Lender the following:

               9.5.1 Note. The Note reflecting the initial funding of the Loan
in accordance with Section 1.1 of this Agreement.

               9.5.2 Security Agreement. The Security Agreement in accordance
with Section 2 of this Agreement.

                                       10
<PAGE>   11

               9.5.3 Articles of Formation. A filed copy of the Articles of
Formation of Custom Nutrition, LLC.

               9.5.4 License Agreement. An executed License Agreement granting
to Custom Nutrition, LLC a world-wide, perpetual, royalty-free license to all
FitnessAge, Inc. intellectual property rights in connection with the sale of
nutrition products. The License Agreement shall be exclusive during the period
there is any amount remaining due under the Notes, and shall automatically
become non-exclusive thereafter. The License Agreement and related documents
shall be in a form and substance satisfactory to Lender, and provided there is
no default by the Corporation under this Agreement or the Notes, the License
Agreement shall provide a right to the Corporation to issue non-exclusive
licenses to any licensee or customer of the Corporation who wants to use the
licensed technology to sell nutritional products, and who does not wish to
purchase nutritional products from Custom Nutrition, LLC.

               9.5.5 Operating Agreement. An executed Operating Agreement
governing the structure and operation of Custom Nutrition, LLC satisfactory to
the parties by and among Custom Nutrition, LLC, and Lender in the form and
substance satisfactory to Lender.

               9.5.6 Manufacturing Agreement. An executed exclusive
manufacturing agreement satisfactory to the parties by and among Custom
Nutrition, LLC and Lender in the form and substance satisfactory to Lender.

               9.5.7 Liens Subordinate to License. All parties holding any lien
encumbering the technology licensed as referenced in Section 9.5.4 above shall
enter into all documents reasonably required to insure the license is not
subject to any lien.

               9.5.8 Senior Debt Modified. The approximate $1.6 million of debt
of the Company referred to in Section 3(a) of the Notes shall be modified so as
not to be in default at any time there are amounts remaining due under this Loan
and the Notes.

SECTION 10.    INDEMNIFICATION

        The Corporation agrees to indemnify and hold harmless the Lender from
and against, and to reimburse the Lender with respect to, any and all loss,
damage, liability, cost, and expense, including reasonable attorney's fees,
incurred by the Lender by reason of or arising out of or in connection with:

        10.1 Breach of Representations and Warranties. A breach of any
representation or warranty contained in this Agreement or in any certificate
delivered to the Lender by the Corporation pursuant to the provisions of this
Agreement.

        10.2 Breach of Obligations. The failure of the Corporation to perform
any covenant or agreement required by this Agreement to be performed by the
Corporation.

                                       11
<PAGE>   12

        10.3 Third-Party Obligations. The alleged existence by any third party
of any liability, obligation, lease, agreement, contract, other commitment, or
state of facts that, if it existed, would constitute a breach of any
representation or warranty contained in this Agreement or in any certificate
delivered to the Lender pursuant to the provisions of this Agreement. The Lender
agrees to give prompt notice to the Corporation of the alleged existence by any
third party of any liability, obligation, lease, agreement, contract, other
commitment, or state of facts referred to in this Section 10.3, and the
Corporation shall have the right to participate in, and, with the consent of the
Lender, which consent shall not be unreasonably withheld, to control the contest
and defense of any such claim at its own cost and expense including the cost and
expense of attorney's fees in connection with such contest and defense. In the
event that the contest and defense of any such claim is so controlled by the
Corporation, the Corporation will not be liable to the Lender pursuant to the
provisions of this Section 10 for any legal or other expense incurred by the
Lender in connection with the defense thereof, other than reasonable costs of
investigations, subsequent to the control being so assumed.

SECTION 11.    NATURE AND SURVIVAL OF REPRESENTATIONS

        All statements contained in any certificate, instrument, or document
delivered by or on behalf of any of the parties pursuant to this Agreement and
the transactions contemplated by this Agreement shall be deemed representations
and warranties by the respective parties. All representations and warranties
made by the parties, each to the other, in or pursuant to this Agreement shall
survive the consummation of the transactions contemplated by this Agreement,
notwithstanding any investigation heretofore or hereafter made by either of the
parties or on behalf of either of them, and shall expire on the second
anniversary of the payment or conversion in full of the Notes.

SECTION 12.    ASSIGNMENT

        Neither this Agreement nor any right or obligation hereunder shall be
assigned by the Corporation without the prior written consent of the Lender. It
is expressly understood that there are no restrictions on the transfer or
assignment of this Agreement, the Note, the Warrant, or the Security Agreement
by the Lender.

SECTION 13.    MISCELLANEOUS PROVISIONS

        13.1 Further Assurances. The Corporation will, without cost or expense
to the Lender, execute and deliver or cause to be executed and delivered to the
Lender such further instruments of transfer and conveyance and will take such
other action as the Lender may reasonably request to more effectively consummate
the transactions contemplated by this Agreement.

        13.2 Binding Effect. The provisions of this agreement shall be binding
upon and inure to the benefit of the successors and assigns of the parties.

                                       12
<PAGE>   13

        13.3 Notice. Any notice or other communication required or permitted to
be given under this agreement shall be in writing and shall be mailed by
certified mail, return receipt requested, postage prepaid, addressed to the
parties at the following addresses.

               Corporation:

               Attention: Chief Financial Officer
               FitnessAge, Inc.
               4250 Executive Square, Suite 101
               La Jolla, California 92037

               Lender:

               Natural Alternatives International, Inc.
               1185 Linda Vista Drive
               San Marcos, California 92069
               Attention: Chief Financial Officer

               with a copy to:

               David A. Fisher
               Fisher Thurber LLP
               4225 Executive Square, Suite 1600
               La Jolla, California 92037

All notices and other communications shall be deemed to be given at the
expiration of three days after the date of mailing. The address of a party to
which notices or other communications shall be mailed may be changed from time
to time by giving written notice to the other parties.

        13.4 Litigation Expense. In the event of a default under this agreement,
the defaulting party shall reimburse the nondefaulting party or parties for all
costs and expenses reasonably incurred by the nondefaulting party or parties in
connection with the default, including, without limitation, attorney's fees.
Additionally, in the event a suit or action is filed to enforce this agreement
or with respect to this agreement, the prevailing party or parties shall be
reimbursed by the other party for all costs and expenses incurred in connection
with the suit or action, including, without limitation, reasonable attorney's
fees at the trial level and on appeal.

        13.5 Waiver. No waiver of any provision of this agreement shall be
deemed, or shall constitute, a waiver of any other provision, whether or not
similar, nor shall any waiver constitute a continuing waiver. No waiver shall be
binding unless executed in writing by the party making the waiver.

                                       13
<PAGE>   14

        13.6 Applicable Law. This agreement shall be governed by and shall be
construed in accordance with the laws of the state of Delaware.

        13.7 Entire Agreement. This Agreement, together with the Notes and the
Security Agreement constitute the entire agreement between the parties
pertaining to their subject matter, and supersede all prior contemporaneous
agreements, representations, and understandings of the parties. No supplement,
modification, or amendment of this Agreement shall be binding unless executed in
writing by all parties.

Corporation:                            Lender:

FitnessAge, Inc.                        Natural Alternatives International, Inc.
a Nevada corporation                               a Delaware corporation

By:  /s/ David G. Forster               By:  /s/ Mark A.  LeDoux
    -----------------------------           ------------------------------------
    David G. Forster,                       Mark A. LeDoux,
    Chief Financial Officer                 Chief Executive Officer

                                       14

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