TRADEMARK LICENSE AGREEMENT


         THIS TRADEMARK LICENSE AGREEMENT ("Agreement"), effective as of
   March 1, 1997, is made by and between CARRINGTON LABORATORIES, INC.
   ("Licensor"), a Texas corporation, having its principal place of
   business at 2001 Walnut Hill Lane, Irving, Texas 75038, and DAVID
   WHEELER, doing business as LIGHT RESOURCES UNLIMITED ("Licensee") with
   its principal place of business at 20 West 20th Street, #803, New York,
   New York, 10011.


                             W I T N E S S E T H:

         WHEREAS, simultaneously with the execution of this Agreement,
   Licensor and Licensee are entering into a Supply Agreement of even date
   herewith (the "Supply Agreement") for the sale by Licensor and purchase
   by Licensee of bulk AVMP[TM] Powder and/ or Manapol[R] Gold [TM] Powder
   (hereinafter referred to under the product name of bulk AVMP[TM] Powder
   and/ or Manapol[R] Gold[TM] Powder to be sold in bulk by Licensee ("the
   Products");

         WHEREAS, Carrington Laboratories, Inc., a Texas corporation
   ("Carrington"), claims the ownership of the trademarks AVMP[TM] Powder and
   Manapol[R] Gold[TM] Powder (the "Marks") and has granted to Licensee a
   license to use the Marks on a non-exclusive basis;

         WHEREAS, Licensee is desirous of obtaining from Licensor, and
   Licensor is willing to grant to Licensee, a license, but not an
   obligation, to use the product names AVMP[TM] Powder and Manapol[R] Gold
   [TM] Powder (the "Marks") in connection with the advertising and sale of the
   Products subject to the terms, conditions and restrictions set forth
   herein; and

         WHEREAS, Licensor and Licensee are mutually desirous of insuring
   the consistent quality of all the Products sold in connection with the
   Marks;

         NOW, THEREFORE, in consideration of premises, the mutual
   covenants, promises and agreement set forth herein, and other good and
   valuable consideration, the receipt and sufficiency of which are hereby
   acknowledged, the parties hereby covenant, promise and agree as
   follows:
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                                  Article 1

                                   LICENSE

         1.1   Terms and Conditions.  Licensor hereby grants to Licensee
   the non-transferable right and license to use the Marks in connection
   with the labeling, advertising and sale of the Products sold by
   Licensee during the term of this Agreement.  During the term of this
   Agreement, Licensee shall have the non-exclusive right to use the Marks
   in connection with the Products only containing AVMP[TM] Powder and/or
   Manapol[R] Gold[TM] Powder that are intended for sale to the ultimate
   consumer in the United States and Canada.  However, Licensee shall not
   be required to use either mark if it makes no representations or
   references to the source of the bulk powder product it sells.

         1.2   License Coterminous With Supply Agreement.  The license
   granted by this Agreement shall run coterminously with the Supply
   Agreement, as well as non-exclusive extensions thereto, and any actions
   or events which shall operate to extend or terminate the Supply
   Agreement shall automatically extend or terminate this Agreement
   simultaneously.

         1.3   Sublicenses.  Licensee shall not have the right without
   written permission from Licensor to grant sublicenses with respect to
   the license granted herein; however, Licensee may engage a third party
   or parties to make and affix labels for the Products in compliance with
   Articles 2,3, and 4 hereof, and/or to distribute and sell the Products
   in compliance with the terms and conditions of this Agreement. 
   Licensee shall be expressly obligated to ensure full compliance with
   all terms and conditions of this Agreement.

                                  Article 2

                       CERTAIN OBLIGATIONS OF LICENSEE

         2.1   Representations by Licensee.  Licensee shall not represent
   in any manner that it owns any right, title or interest in or to the
   Marks.  Licensee acknowledges that its use of the Marks shall inure to
   the benefit of Licensor and shall not create in Licensee's favor any
   right, title or interest in or to the Marks.

         2.2   Discontinuation of Use of Marks.  Upon the expiration or
   termination of this Agreement any non-exclusive Supply Agreement,
   Licensee will cease and desist from all use of the Mark in any manner
   and will not adopt or use, without Licensor's prior written consent,
   any word or Marks which is confusingly or deceptively similar to the
   Marks, except that Licensee may continue to use the Marks under the
   terms and conditions of this Agreement in connection with any remaining
   supplies of the Products purchased by Licensee from Licensor until such
   supplies are exhausted. 

         2.3   Standards.  All bulk products on which the Marks are used
   by Licensee shall be of consistent quality and shall meet or exceed all
   standards set by Licensor, in Licensor's sole discretion, from time to
   time.  Licensee shall have thirty (30) days from the receipt of written
   notice of any change in the standards to comply with any new
   requirements.
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         2.4   FDA Compliance of Products.  All bulk products on which the
   Marks are used by Licensee shall be packaged, labeled, advertised,
   marketed and sold in compliance with (i) the Federal Food, Drug and
   Cosmetic Act and the rules and regulations promulgated thereunder, as
   amended from time to time, and (ii) all other applicable laws, rules
   and regulations. 

         2.5   Inspection.  Licensor reserves the right to inspect
   Licensee's products bearing the Marks and Licensee's packaging
   facilities at all reasonable times to insure Licensee's compliance with
   this Agreement.  

         2.6   Use of Trademark.  Licensee shall not use the Marks except
   as specifically set forth herein.  Without limiting the generality of
   the preceding sentence, Licensee shall not use the Marks in connection
   with the sale or advertising of any products other than the Products.

         2.7   Trademark Registration.  At Licensor's request and expense
   and, except as otherwise provided herein at Licensor's sole discretion
   and option, Licensee shall take whatever action is reasonably necessary
   to assist Carrington or its assigns in registering the Marks with the
   U.S. Patent and Trademark Office ("USPTO") and/or in perfecting,
   protecting or enforcing Carrington's and Licensor's rights in and to
   the Marks.  Licensee understands that Carrington or its assigns may
   rely solely on Licensee's use of the Marks to obtain or maintain
   registration with the USPTO.

                                  Article 3

                                    SALE 

         3.1   Combination With Other Products.  Licensee shall not
   combine the Products with any product or substance in any manner which
   would violate any laws, regulations of any state, federal or other
   governmental body.  Licensee shall not combine the Products with any
   other substance in a product that is to be advertised or sold for use
   or consumption by humans or animals if the approval of the U.S. Food
   and Drug Administration (the "FDA") or the U.S. Department of
   Agriculture ("USDA") for such use or consumption is required and has
   not been obtained.

         3.2   Compliance by Third Parties.  Licensee shall take all steps
   reasonably necessary to ensure that its distributors and any other
   parties to whom it sells any of the Products for resale do not relabel,
   repackage, advertise, sell or attempt to sell the Products or any of
   the Products in a manner that would violate this Agreement if done by
   Licensee.

                                  Article 4

                            LABELS AND ADVERTISING

         4.1   FDA Compliance of Labels and Advertising.  All labels and
   advertising relating to the Products offered in connection with the
   Marks must strictly comply with all applicable rules and regulations of
   the FDA and all other applicable laws, rules and regulations, including
   but not limited to FDA requirements relating to product ingredients. 
   Information regarding the ingredients of the Products shall be
   furnished to Licensee by Licensor from time to time.
<PAGE>
         4.2   Mandatory Requirements.  Licensee shall cause all labels,
   packaging, advertising and promotional materials used by it in
   advertising, marketing and selling the Products by or on behalf of
   Licensee include the following legend:

               AVMP[TM] Powder is a trademark of Carrington Laboratories, Inc.
               Manapol[R] Gold[TM] Powder is a trademark of Carrington 
               Laboratories, Inc.

         4.3   Claims by Licensee.  Licensee hereby agrees not to make, or
   permit any of its employees, agents or distributors to make, any claims
   of any properties or results relating to the Products, unless such
   claims have received written approval from the FDA.

         4.4   FDA or USDA Approval of Claims.  If Licensee desires to
   seek FDA or USDA approval as to any specific claims with respect to the
   Products, Licensee hereby agrees to (i)  notify Licensor of the claims
   and the application prior to filing and (ii) to keep Licensor informed
   as to the progress of the application, including but not limited to
   sending Licensor copies of all communications or notices to or from the
   FDA or USDA, as applicable.

         4.5   Right to Approve Labels, etc.  If Licensor so requests,
   Licensee shall not use any label, advertisement or marketing material
   that contains the Marks unless such label, advertisement or marketing
   material has first been submitted to and approved by Licensor. 
   Licensor shall not unreasonably withhold its approval of any such
   label, advertisement or marketing material.

                                  Article 5

               NEGATION OF WARRANTIES, DISCLAIMER AND INDEMNITY

         5.1   Negation of Warranties, etc.  Nothing in this Agreement
   shall be construed or interpreted as:

         (a)   a warranty or representation by Licensor that any product
   made, used, sold or otherwise disposed of under the license granted in
   this Agreement is or will be free of infringement or the like of the
   rights of third parties; or

         (b)   an obligation by Licensor to bring or prosecute actions or
   suits against third parties for infringement or the like of the Marks
   or of any registration that may subsequently be granted for such Marks;
   or

         (c)   granting by implication, estoppel or otherwise any licenses
   or rights other than those expressly granted hereunder.

         5.2   Disclaimer.  LICENSOR MAKES NO REPRESENTATIONS, EXTENDS NO
   WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT
   LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS AND FITNESS FOR A
   PARTICULAR PURPOSE, AND ASSUMES NO RESPONSIBILITIES WHATSOEVER WITH
   RESPECT TO THE USE, SALE OR OTHER DISPOSITION BY LICENSEE OR ITS
   CUSTOMERS, VENDEES OR OTHER TRANSFEREES, WITH RESPECT TO THE MARKS OR
   ANY OF THE PRODUCTS MADE OR SOLD BY LICENSEE.
<PAGE>
         5.3   Liability of Licensee for Products.  Licensee shall assume
   all financial and other obligations for the Products made and sold by
   it under this Agreement and Licensor shall not incur any liability or
   responsibility to Licensee or to third parties arising out of or
   connected in any manner with Licensee's products made or sold pursuant
   to this Agreement.  In no event shall Licensor be liable for lost
   profits, special damages, consequential damages or contingent
   liabilities arising out of or connected in any manner with this
   Agreement or the Products made or sold by Licensee under this
   Agreement.

         5.4   Indemnity of Licensor.  Licensee agrees to defend,
   indemnify and hold Licensor, its officers, directors, employees and
   agents, harmless against all claims, liabilities, demands, damages,
   expenses or losses arising out of or connected with (a) the use by
   Licensee of the Marks or (b) any use, sale or other disposition of
   Licensee's Products by Licensee or by any other party.

         5.5   Negation of Trademark Warranty.  Licensee acknowledges that
   Licensor makes no warranty, express or implied, with respect to its
   ownership of any rights relating to the Marks.

                                  Article 6

                             TERM AND TERMINATION

         6.1   Term.  Unless terminated earlier as provided for herein,
   this Agreement shall remain in full force and effect for a five (5)-
   year period ending at May 4, 2002.  This Agreement may be extended or
   renewed as provided in Section 1.2, or otherwise by the written
   agreement of the parties.

         6.2   Breach of Agreement.  Except as provided otherwise in
   Section 6.3, if either party breaches any material provision of this
   Agreement and fails to cure the breach within thirty (30) days after
   receipt of written notice from the nonbreaching party specifying the
   breach, then the nonbreaching party may terminate this Agreement upon
   written notice to the breaching party, which right of termination shall
   be in addition to, and not in lieu of, all other rights and remedies
   the nonbreaching party may have against the breaching party under this
   Agreement, at law or in equity.  Failure by Licensor to give notice of
   termination with respect to any such failure shall not be deemed a
   waiver of its right at a later date to give such notice if such failure
   continues or again occurs, or if another failure occurs.  A breach by
   either party of a material provision of the Supply Agreement shall be
   deemed a breach by such party of a material provision of this
   Agreement.

         6.3   Immediate Termination.  Licensor may immediately terminate
   this Agreement, upon written notice to Licensee, upon the occurrence of
   any one or more of the following events:  (i) Licensee breaches any
   provision of Articles 2, 3, or 4; (ii) Licensee fails to purchase
   and/or to pay for the quantities of the Products that it is obligated
   to purchase and pay for under the Supply Agreement in accordance with
   the terms thereof; (iii) Licensee voluntarily seeks protection under
   any federal or state bankruptcy or insolvency laws; (iv) a petition for
   bankruptcy or the appointment of a receiver is filed against Licensee
<PAGE>
   and is not dismissed within thirty (30) days thereafter; (v) Licensee
   makes any assignment for the benefit of its creditors; or (vi) Licensee
   ceases doing business.

         6.4   Survival of Provisions.  In the event of termination,
   cancellation or expiration of this Agreement for any reason, Sections
   2.2, 5.1,5.2, 5.3, 5.4, 5.5 and 7.1 hereof shall survive such
   termination, cancellation or expiration and remain in full force and
   effect.

                                  Article 7

                                MISCELLANEOUS

         7.1   Equitable Relief.  A breach or default by Licensee of any
   of the provisions of Articles 2, 3 and 4 hereof shall cause Licensor to
   suffer irreparable harm and, in such event, Licensor shall be entitled,
   as a matter of right, to a restraining order and other injunctive
   relief from any court of competent jurisdiction, restraining any
   further violation thereof by Licensee, its officers, agents, servants,
   employees and those persons in active concert or participation with
   them.  The right to a restraining order or other injunctive relief
   shall be supplemental to any other right or remedy Licensor may have,
   including, without limitation, the recovery of damages for the breach
   or default of any of the terms of this Agreement.

         7.2   Amendment.  This Agreement may be changed, modified, or
   amended only by an instrument in writing duly executed by each of the
   parties hereto.

         7.3   Entire Agreement.  This Agreement constitutes the full and
   complete agreement of the parties hereto and supersedes any and all
   prior understandings, whether written or oral, with respect to the
   subject matter hereof.

         7.4   No Waiver.  The failure of either party to insist upon
   strict performance of any obligation hereunder by the other party,
   irrespective of the length of time for which such failure continues,
   shall not be a waiver of its right to demand strict compliance in the
   future.  No consent or waiver, express or implied, by either party to
   or of any breach or default in the performance of any obligation
   hereunder by the other party shall constitute a consent or waiver to or
   of any other breach or default in the performance of the same or any
   other obligation hereunder.

         7.5   Notices.  All notices required or permitted to be made or
   given pursuant to this Agreement shall be in writing and shall be
   considered as properly given or made when personally delivered or when
   duly deposited in the mails, first class mail, postage prepaid, or when
   transmitted by prepaid telegram, and addressed to the applicable
   address first above written or to such other address as the addressee
   shall have theretofore specified in a written notice to the notifying
   party.

         7.6   Assignment.  This Agreement or any of the rights or
   obligations created herein may be assigned, in whole or in part, by
   Licensor.  However, this Agreement is personal to Licensee, and
   Licensee may not assign this Agreement or any of its rights, duties or
<PAGE>
   obligations under this Agreement to any third party without Licensor's
   prior written consent, and any attempted assignment by Licensee not in
   accordance with this Section 8.6 shall be void.

         7.7   Relationship of Parties.  Nothing contained herein shall be
   construed to create or constitute any employment, agency, partnership
   or joint venture arrangement by and between the parties, and neither of
   them has the power or authority, express or implied, to obligate or
   bind the other in any manner whatsoever.

         7.8   Remedies Cumulative.  Unless otherwise expressly provided
   herein, the rights and remedies hereunder are in addition to, and not
   in limitation of, any other rights and remedies, at law or in equity,
   and the exercise or one right or remedy will not be deemed a waiver of
   any other right or remedy.

         7.9   Successors and Assigns.  The provisions of this Agreement
   shall be binding upon and inure to the benefit of the parties and their
   respective successors and assigns, provided, however, that the
   foregoing shall not be deemed to expand or otherwise affect the
   limitations on assignment and delegation set forth in Section 8.6
   hereof, and except as otherwise expressly provided in this Agreement,
   no other person or business entity is intended to or shall have any
   right or interest under this Agreement.

         7.10  Governing Law.  This Agreement shall be governed by and
   interpreted, construed and enforced in accordance with the laws of the
   State of Texas, excluding, however, any conflicts of law rules that
   would require the application of the laws of any other state or
   country.

         7.11  Headings.  The headings used in this Agreement are for
   convenience of reference only and shall not be used to interpret this
   Agreement.

         7.12  Counterparts.  This Agreement may be executed in multiple
   counterparts, each of which shall be deemed an original and all of
   which will constitute but one and the same instrument.

         IN WITNESS WHEREOF, the parties have caused this Agreement to be
   executed by their duly authorized representatives as of the date first
   above written.

                                       CARRINGTON LABORATORIES, INC.



                                       By:                                
                                       Name:                        
                                       Title:                       


                                       DAVID WHEELER, dba
                                       LIGHT RESOURCES UNLIMITED



                                       By:                                
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