Document:

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                                                                    EXHIBIT 10.2

                               SECURITY AGREEMENT

                           This Security Agreement (the "AGREEMENT") is made as
         of October 23, 2002, by and between INTERLEUKIN GENETICS, INC., a
         Delaware corporation, of 135 Beaver Street, 2nd Floor, Waltham,
         Massachusetts 02452 ("DEBTOR"), and PYXIS INNOVATIONS INC., a Delaware
         corporation, of 7575 Fulton Street East, Ada, Michigan 49355-0001
         ("SECURED PARTY").

                           Debtor and Secured Party are parties to a Note
         Purchase Agreement, dated as of the date of this Agreement (the "NOTE
         PURCHASE AGREEMENT"). Section 2.3 of the Note Purchase Agreement
         requires that this Agreement be delivered in connection with the
         initial closing of the transactions contemplated by the Note Purchase
         Agreement.

                           The parties agree as follows:

                  1. GRANT OF SECURITY INTEREST. Debtor grants to Secured Party
         a continuing security interest in:

                  1.1. The United States patents and patent applications set
         forth on SCHEDULE A, including all related divisions, continuations,
         continuations-in-part, continuing prosecution applications, extensions,
         reissues, reexaminations and foreign counterparts;

                  1.2. All other existing and after-acquired intellectual
         property assets of Debtor, including without limitation all ideas,
         inventions, discoveries, improvements, know-how, trade secrets,
         confidential information, proprietary information and all other
         intellectual property as well as all related patents, trademarks,
         design patents, utility models, design registrations, industrial
         designs, copyrights, trade dress rights, trade secret rights,
         intellectual property licenses and all other intellectual property
         rights of the Debtor (collectively, "OTHER INTELLECTUAL PROPERTY
         ASSETS"), excluding from the Other Intellectual Property Assets only
         those intellectual property assets exclusively related to periodontal
         disease and sepsis; and

                  1.3. All existing and after-acquired accounts and general
         intangibles of Debtor relating to or arising out of the property and
         assets described in Sections 1.1 or 1.2, including without limitation
         all licenses; together with (a) all proceeds of the foregoing,
         including, without limitation, all cash, checks, drafts, accounts
         receivable, chattel paper, leases and instruments that Debtor receives
         in connection with any sale, lease, license, exchange or other
         disposition of any of the foregoing, and (b) all books, records
         (including computer software) and documents that at any time evidence
         or relate to any of the foregoing or any proceeds of the foregoing. All
         of the foregoing properties and assets of Debtor are referred to
         collectively in this Agreement as the "COLLATERAL."

                  2. INDEBTEDNESS SECURED. The foregoing security interest is
         given to secure payment and performance of all obligations and
         indebtedness that Debtor now and in the future owes to Secured Party
         under this Agreement and the obligations and indebtedness evidenced by
         the following instruments, documents, or agreements which Debtor has
         signed:
<PAGE>
<TABLE>
<CAPTION>
                  INSTRUMENT, DOCUMENT
                       OR AGREEMENT                       DATE                   AMOUNT
                       ------------                       ----                   ------
<S>                                                  <C>                        <C>
                  Note Purchase Agreement            October 23, 2002
                  Promissory Note                    October 23, 2002           $500,000
                  Promissory Note                    November 15, 2002          $500,000
                  Promissory Note                    December 16, 2002          $500,000
</TABLE>

         The indebtedness and obligations that this security interest secures
         are collectively called the "INDEBTEDNESS."

                  3. WARRANTIES, REPRESENTATIONS, AND AGREEMENTS. Debtor
         warrants and represents to Secured Party, and agrees, as follows:

                  3.1. Debtor is the exclusive owner of the Collateral, and none
         of the Collateral is subject to any lien, security interest,
         encumbrance or claim in favor of any third party, and no financing
         statement is on file in any public office covering any of the
         Collateral.

                  3.2. All information that Debtor has furnished or in the
         future furnishes to Secured Party concerning Debtor or the Collateral,
         including, without limitation, all information concerning the
         condition, quality or value of the Collateral, is and will be correct
         and complete in all material respects.

                  3.3. Debtor's exact legal name is set forth in the first
         paragraph of this Agreement, and Debtor's employer identification
         number is 94-3123681. Debtor's address set forth on the first page of
         this Agreement is the location of Debtor's sole place of business.

                  4. AGREEMENTS OF DEBTOR. Debtor agrees that:

                  4.1. Debtor shall not cause or permit any lien, security
         interest or encumbrance to be placed on any Collateral, except in favor
         of Secured Party. Unless otherwise agreed in advance by Secured Party
         in writing, Debtor shall not license, sell, assign, or transfer any
         Collateral or permit the Collateral to be transferred by operation of
         law.

                  4.2. Debtor shall maintain all records concerning the
         Collateral at Debtor's address appearing on the first page of this
         Agreement. Debtor shall furnish to Secured Party all information
         regarding the Collateral that Secured Party from time to time requests
         and shall allow Secured Party at any reasonable time to inspect the
         Collateral and Debtor's records regarding the Collateral.

                  4.3. Debtor shall sign, file, record or obtain from third
         persons, all subordination agreements and other documents, and shall
         take all other actions, that Secured Party considers necessary or
         appropriate to perfect, to continue perfection of, or to maintain first
         priority of, Secured Party's security interest in the Collateral.
         Actions that Secured Party may require Debtor to take under the
         preceding sentence include, without limitation, (a) giving Secured
         Party possession of Collateral, and (b) obtaining from any third party
         who has possession of Collateral an acknowledgment that the third party
         holds the Collateral for Secured Party.

                  4.4. Debtor shall promptly notify Secured Party in writing of
         any change in Debtor's name, identity or corporate structure, and of
         any change in the location of Debtor's place of business and of the
         location of each additional place of business that Debtor establishes.
         Debtor shall not make any change in its name or its organizational
         structure or in the jurisdiction under the laws of which Debtor is
         organized, without Secured Party's prior written consent.

                  4.5. Debtor shall indemnify Secured Party with respect to all
         losses, damages, liabilities and expenses (including attorney fees)
         that Secured Party incurs by reason of any failure of Debtor to comply
         with any obligation under this Agreement or by reason of any warranty
         or representation that Debtor makes to Secured Party in this Agreement
         being false in any material respect.

                                      -2-
<PAGE>
                  5. SECURED PARTY'S RIGHT TO PERFORM. If Debtor fails to
         perform any obligation of Debtor under this Agreement, then Secured
         Party may, without giving notice to or obtaining the consent of Debtor,
         perform that obligation on behalf of Debtor. Debtor shall reimburse
         Secured Party on demand for any expense that Secured Party incurs in
         performing the obligation and shall pay to Secured Party interest on
         each expense, from the date the expense was incurred by Secured Party,
         at an annual rate equal to the lesser of (a) 15 percent, or (b) the
         highest rate to which Debtor could lawfully agree in writing. Secured
         Party is not required to perform an obligation that Debtor has failed
         to perform. If Secured Party does so, then that shall not be a waiver
         of Secured Party's right to declare the Indebtedness immediately due
         and payable by reason of Debtor's failure to perform.

                  6. EVENTS OF DEFAULT AND ACCELERATION. Any part or all of the
         Indebtedness shall, at the option of Secured Party, become immediately
         due and payable without notice or demand upon the occurrence of an
         event of default as specified in the promissory notes described in
         Section 2.

                  7. SECURED PARTY'S RIGHTS AND REMEDIES. Secured Party shall
         have all rights and remedies of a secured party under applicable laws.
         Without limiting those rights and remedies:

                  7.1. Upon the occurrence of an event of default: (a) without
         notice or demand to Debtor, Secured Party shall be entitled to notify
         Debtor's account debtors, obligors and licensees, to make all payments
         directly to Secured Party, and Secured Party shall have the right to
         take all actions that Secured Party considers necessary or desirable to
         collect upon the Collateral, including, without limitation, prosecuting
         actions against, or settling or compromising disputes and claims with,
         Debtor's account debtors, obligors, and licensees, (b) without notice
         or demand to Debtor, Secured Party may receive, open, dispose of and
         notify the postal authorities to change the address of, mail directed
         to Debtor, and (c) upon Secured Party's demand, Debtor shall
         immediately deliver to Secured Party, at the place that Secured Party
         designates, all proceeds of the Collateral and all books, records,
         agreements, licenses, leases, documents and instruments that evidence
         or relate to the Collateral.

                  7.2. If all or any part of the Indebtedness is not paid at
         maturity, then Debtor, upon Secured Party's demand, shall deliver the
         Collateral and proceeds of Collateral to Secured Party at the place
         that Secured Party designates, and Secured Party may dispose of the
         Collateral in any commercially reasonable manner in accordance with
         applicable law. Any notification that Secured Party is required to give
         to Debtor regarding any sale or other disposition of Collateral shall
         be considered reasonable if it is mailed at least ten days before the
         sale or other disposition.

                  7.3. If all or any part of the Indebtedness is not paid at
         maturity, then Secured Party shall have the right (but no obligation)
         to continue or complete the processing of, or other operations in
         connection with, any part of the Collateral, and, for that purpose, to
         enter and remain upon or in any land or buildings that are possessed by
         Debtor or that Debtor has the right to possess. Debtor shall reimburse
         Secured Party on demand for any expense that Secured Party incurs in
         connection with those activities and shall pay to Secured Party
         interest on each expense, from the date on which Secured Party incurred
         the expense, at the rate specified in Section 5.

                  7.4. Secured Party shall apply the proceeds of any collection
         or disposition of Collateral first to expenses that Secured Party
         incurs in retaking, holding, preparing for disposition, processing and
         disposing of the Collateral and to Secured Party's attorney fees and
         expenses, as provided in Section 8, and then to the Indebtedness, and
         Debtor shall be liable for any deficiency remaining. Secured Party does
         not have any obligation to prepare or process any Collateral for sale
         or other disposition. If Secured Party sells any of the Collateral on
         credit, then Debtor will be credited only with payments that the
         purchaser actually makes and that Secured Party receives and applies to
         the unpaid balance of the purchase price of the Collateral. If the
         purchaser fails to pay for the Collateral, then Secured Party may again
         dispose of the Collateral and apply the proceeds in accordance with
         this paragraph.

         All rights and remedies of Secured Party shall be cumulative and may be
         exercised from time to time.

                  8. EXPENSES. Debtor shall reimburse Secured Party on demand
         for all attorney fees, legal

                                      -3-
<PAGE>
         expenses and other expenses that Secured Party incurs in protecting and
         enforcing its rights under this Agreement. This includes fees and
         expenses that Secured Party incurs in trying to take possession of
         Collateral from Debtor, a trustee or receiver in bankruptcy or any
         other person. Secured Party may apply any proceeds of collection or
         disposition of Collateral to Secured Party's reasonable attorney fees,
         legal expenses and other expenses.

                  9. AMENDMENTS AND WAIVERS. A provision of this Agreement may
         not be modified or waived except by a written agreement that Secured
         Party signs. Secured Party shall continue to have all of its rights
         under this Agreement even if it does not fully and promptly exercise
         them on all occasions.

                  10. NOTICES. Any notice to Debtor or to Secured Party shall be
         considered to be given if and when delivered pursuant to Section 8.5 of
         the Note Purchase Agreement.

                  11. OTHER. In this Agreement, "MATURITY" of any of the
         Indebtedness means the time when that Indebtedness has become due and
         payable, for whatever reason (including, for example, acceleration due
         to default or bankruptcy). This Agreement shall be governed by, and
         interpreted according to, Michigan law.

                  12. BINDING EFFECT. This Agreement shall be binding upon and
         inure to the benefit of Debtor and Secured Party and their respective,
         successors and assigns.

                  SECURED PARTY AND DEBTOR EACH IRREVOCABLY AND UNCONDITIONALLY
         WAIVES ITS RIGHT TO A TRIAL BY JURY IN ANY ACTION, INCLUDING ANY CLAIM,
         COUNTERCLAIM, CROSS-CLAIM OR THIRD-PARTY CLAIM ("CLAIM"), THAT IS BASED
         UPON, ARISES OUT OF OR RELATES TO THIS SECURITY AGREEMENT OR THE
         INDEBTEDNESS, INCLUDING, WITHOUT LIMITATION, ANY CLAIM THAT IS BASED
         UPON, ARISES OUT OF OR RELATES TO ANY ACTION OR INACTION OF SECURED
         PARTY IN CONNECTION WITH ANY ACCELERATION OF THE INDEBTEDNESS OR ANY
         ENFORCEMENT OF SECURED PARTY'S SECURITY INTEREST IN THE COLLATERAL.

         Debtor and Secured Party have signed this Security Agreement as of the
         date stated on the first page.

                                        INTERLEUKIN GENETICS, INC.
                                                 DEBTOR

                                        By:      /s/ Fenel Eloi
                                                 -------------------------------
                                                 Name:   Fenel Eloi
                                                 Title: Chief Financial Officer

                                        PYXIS INNOVATIONS INC.
                                                   SECURED PARTY

                                        By:      /s/ Janice Jackson
                                                 -------------------------------
                                                 Name:   Janice Jackson
                                                 Title:

                                      -4-<PAGE>
                                                                    EXHIBIT 10.3

                             FORM OF PROMISSORY NOTE

                                                            [________ ___, 2002]
         $500,000                                                  Ada, Michigan

                  FOR VALUE RECEIVED, the undersigned, INTERLEUKIN GENETICS,
         INC., a Delaware corporation, of 135 Beaver Street, 2nd Floor, Waltham,
         Massachusetts 02452 (the "COMPANY"), promises to pay to PYXIS
         INNOVATIONS INC., a Delaware corporation, of 7575 Fulton Street East,
         Ada, Michigan 49355-0001 ("PAYEE"), the principal amount of Five
         Hundred Thousand Dollars ($500,000.00) and interest on the unpaid
         principal balance at a rate per annum of 15 percent until maturity and
         18 percent after maturity.

                  The principal of and accrued interest on this Note shall be
         paid on December 31, 2003. If any portion of the principal or interest
         is not paid when due, then the Company shall immediately pay to Payee a
         late charge in an amount equal to two percent of the principal amount.
         This is in addition to Payee's other rights and remedies for default in
         payment.

                  PREPAYMENTS. The Company may prepay without penalty all or
         part of the principal of this Note at any time.

                  SECURITY. This Note and all obligations of the Company under
         it are secured by a certain Security Agreement, dated October 18, 2002,
         given by the Company to Payee ("SECURITY DOCUMENTS"). Payee shall have
         all of the rights and powers set forth in the Security Documents as
         though they were fully set forth in this Note.

                  DEFAULT AND ACCELERATION. Each of the following shall be an
         "event of default" under this Note and the Security Agreement: (1) if
         default occurs in the payment of principal or interest under this Note
         or of any late charge or out-of-pocket expense that the Company at any
         time owes to Payee under this Note or in the payment of any other
         indebtedness or obligation that the Company now or in the future owes
         to Payee, as and when it shall be or become due and payable; (2) if
         default occurs in the performance of any other obligation to Payee
         under this Note, any Security Document, the Purchase Agreement (as
         defined below) or any other agreement that has been or in the future is
         entered into between the Company and Payee or if there occurs any other
         event of default under any Security Document, the Purchase Agreement,
         or any such other agreement; (3) if any warranty or representation that
         the Company has made or in the future makes to Payee in any Security
         Document or in any financial statement or other document given to
         Payee, shall have been false in any material respect; (4) if the
         Company dissolves, becomes insolvent, or makes an assignment for the
         benefit of creditors; (5) if the Company defaults in the payment of any
         other indebtedness or performance of obligations owed to any other
         party or entity; or (6) a Change of Control of the Company. Upon the
         occurrence of any event of default, all or any part of the indebtedness
         evidenced by this Note and all or any part of all other indebtedness
         and obligations that the Company then owes to Payee shall, at the
         option of Payee, become immediately due and payable without notice or
         demand. If a voluntary or involuntary case in bankruptcy, receivership
         or insolvency shall at any time be begun by or against the Company or
         if any levy, writ of attachment, garnishment, execution or similar
         process shall be issued against or placed upon any property of the
         Company, then all such indebtedness shall automatically become
         immediately due and payable. All or any part of the indebtedness
         evidenced by this Note also may become, or may be declared to be,
         immediately due and payable under the terms and conditions contained in
         any Security Document, the Purchase Agreement, or other agreement that
         has been or in the future is entered into between the Company and
         Payee.

                  "CHANGE OF CONTROL" shall mean (a) a dissolution or
         liquidation of the Company, (b) a merger or consolidation in which the
         Company is not the surviving corporation, (c) a merger or share
         exchange in which the Company is the surviving corporation but after
         which the stockholders of the Company
<PAGE>
         immediately prior to such merger cease to own at least 51% of the
         outstanding shares of the Company, (d) the sale, license, or other
         transfer of substantially all of the assets of the Company, or (e) the
         acquisition, sale, or transfer of more than 50% of the outstanding
         shares of the Company by tender offer or similar transaction.

                  AGREEMENT. This Note is given under a certain Note Purchase
         Agreement, dated October 18, 2002, between Payee and the Company (the
         "PURCHASE AGREEMENT"), and Payee shall have all of the rights and
         powers set forth in the Agreement as though they were set forth fully
         in this Note.

                  PLACE AND APPLICATION OF PAYMENTS. Each payment upon this Note
         shall be made at Payee's address set forth above or any other place
         that Payee directs in writing. Payee shall apply any payment upon it
         first to any expenses (including expenses of collection) then due and
         payable to Payee, then to any unpaid late charges, then to any accrued
         and unpaid interest under this Note and then to the unpaid principal
         balance. If the Company at any time owes Payee any indebtedness or
         obligation in addition to the indebtedness that this Note evidences,
         and if any indebtedness that the Company then owes to Payee is then in
         default, then the Company shall not have any right to direct or
         designate the particular indebtedness or obligation upon which any
         payment made by, or collected from, the Company or from security shall
         be applied. The Company waives any such right and agrees that Payee
         shall determine, in its sole discretion, the manner of application of
         any such payment, as between or among such indebtedness and
         obligations.

                  SETOFF. Payee shall have the right at any time to set off any
         indebtedness that this Note evidences and that is then due and payable
         against any indebtedness that Payee then owes to the Company.

                  REMEDIES. Payee shall have all rights and remedies that the
         law and any agreement of the Company provide. Any requirement of
         reasonable notice with respect to any sale or other disposition of
         collateral shall be met if Payee sends the notice at least ten days
         before the date of sale or other disposition. The Company shall
         reimburse Payee for any and all expenses, including reasonable attorney
         fees and legal expenses, that Payee pays or incurs in protecting and
         enforcing the rights of and obligations to Payee under any provision of
         this Note or any Security Document.

                  WAIVERS. A delay by Payee in the exercise of any right or
         remedy shall not be considered a waiver of it. A single or partial
         exercise by Payee of any right or remedy shall not preclude any other
         or future exercise of it or the exercise of any other right or remedy.
         A waiver by Payee of any default or of any provision of this Note shall
         not be effective unless it is in writing and signed by Payee. A waiver
         of any right or remedy on one occasion shall not be a waiver of that
         right or remedy on any future occasion.

                  The Company waives demand for payment, presentment, notice of
         dishonor and protest of this Note and waives all defenses based on
         suretyship or impairment of collateral. The Company consents to any
         extension or postponement of time of payment of this Note, to any
         substitution, exchange or release of all or any part of any security
         given to secure it, to the addition of any party to it and to the
         release, discharge, waiver, modification or suspension of any rights or
         remedies against any person liable for the indebtedness that this Note
         evidences.

                  GENERAL. In this Note, "MATURITY" means the time when the
         entire remaining unpaid principal balance shall be or shall become due
         and payable for any reason, including acceleration as provided above.

                  APPLICABLE LAW AND JURISDICTION. This Note shall be governed
         by and interpreted according to the laws of the State of Michigan,
         without giving effect to conflict of laws rules. The Company
         irrevocably agrees and consents that any action against the Company for
         collection or enforcement of this Note may be brought in any state or
         federal court that has subject matter jurisdiction and is located in,
         or whose district includes, Kent County, Michigan, and that any such
         court shall have personal jurisdiction and venue over the Company for
         purposes of the action.

                                      -2-
<PAGE>
                  PAYEE AND OBLIGOR EACH IRREVOCABLY AND UNCONDITIONALLY WAIVES
         ITS RIGHT TO A TRIAL BY JURY IN ANY ACTION, INCLUDING ANY CLAIM,
         COUNTERCLAIM, CROSS-CLAIM OR THIRD-PARTY CLAIM ("CLAIM"), THAT IS BASED
         UPON, ARISES OUT OF OR RELATES TO THIS NOTE OR THE INDEBTEDNESS THAT IT
         EVIDENCES, INCLUDING, WITHOUT LIMITATION, ANY CLAIM THAT IS BASED UPON,
         ARISES OUT OF OR RELATES TO ANY ACTION OR INACTION OF PAYEE IN
         CONNECTION WITH ANY ACCELERATION, ENFORCEMENT OR COLLECTION OF THIS
         NOTE OR SUCH INDEBTEDNESS.

                                        INTERLEUKIN GENETICS, INC.

                                        By:  /s/ Fenel Eloi
                                             -----------------------------------
                                             Name: Fenel Eloi
                                             Title: Chief Financial Officer

                                      -3-

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