EXHIBIT 99.1


                   SEPARATION AGREEMENT AND GENERAL RELEASE
                   ----------------------------------------
                         Effective Date June 30, 2001
                         ----------------------------


     This Separation Agreement and General Release ("Agreement") is made and
entered into this 21st day of June, 2001 between Mannatech, Inc. ("Mannatech")
and its affiliates (defined as any entity which owns or controls, is owned or
controlled by, or is under common ownership or control with Mannatech), and
Patrick D. Cobb ("Cobb").  Cobb and Mannatech are collectively referred to
herein as the "Parties."   Mannatech's related entities are collectively
referred to herein as "Affiliates."

     WHEREAS the Parties desire to finally, fully and completely resolve all
disputes that now or may exist between them concerning Cobb's hiring, employment
and termination from Mannatech, and all disputes over benefits and compensations
connected with such employment, and specifically, but not limited to any
disputes arising from the terms of Cobb's employment as set forth in the
Employment Agreement entered into between the Parties as of September 28, 1998
("Employment Agreement").

     NOW, THEREFORE, in consideration of the premises and mutual covenants and
agreement hereinafter set forth, and for other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the Parties hereto
agree as follows:

1.   Separation of Employment.
     ------------------------

     Cobb acknowledges that his employment with Mannatech ends effective June
     30, 2001 ("Separation Date"), and that all benefits and perquisites related
     to Cobb's employment with Mannatech shall cease as of that date. Cobb also
     resigns effective immediately from all positions (including any positions
     as Officer or Director) with any Mannatech subsidiary or affiliate
     companies.  Cobb agrees that during the Month of June 2001, he shall use
     all accrued but unused vacation time and that Mannatech shall be under no
     obligation to pay Cobb for any unused vacation time after the Effective
     Date hereof.  As of the Separation Date, Cobb will have received from
     Mannatech all regular salary payments and benefits in accordance with
     Mannatech's regular salary payment schedule.  Except as otherwise required
     pursuant to this Agreement, no further salary, bonus, benefits or payments
     shall be due from or paid by Mannatech to Cobb, and Cobb hereby waives and
     relinquishes all claims to further employment, compensation, benefits,
     stock, options, or other remuneration from Mannatech.  Mannatech will pay
     items on Cobb's current expense report, including Cobb's CPA registration
     and training scheduled prior to


     execution of this Agreement. Those items total approximately $544.00. On
     the Separation Date, Cobb shall resign as Executive Vice President of
     International Finance and any other job or position held, and acknowledges
     that his employment with Mannatech has terminated.

     Mannatech will continue to include Cobb as a named insured on its
     Director's and Officer's insurance policy for a period of four years
     following the date of this Agreement.  Mannatech will provide Cobb with a
     copy of each policy renewal.

     Mannatech shall indemnify Cobb for any and all expenses, liabilities,
     judgments, and costs, including reasonable attorneys' fees incurred as a
     result of any third party claim asserted against Cobb based on any act or
     omission taken by Cobb in the course and scope of his employment, or as an
     officer or director of Mannatech, provided that this indemnity agreement
     shall not apply to any willful or intentional act by Cobb.

          During 1996 and 1997, Mannatech made cash advances to Agritech Labs,
     Inc. and Agritech Technology, Ltd. (collectively, "Agritech").  The
     Agritech companies were owned by individual partners, of which Cobb served
     as a shareholder and executive officer.  Cobb entered into a promissory
     note on or about June 30, 1997 and entered into renewals and/or extensions
     thereof on each of December 31, 1998 and January 19, 1999.  On February 17,
     1999, Mannatech entered into a new promissory note with Cobb ("Note").  The
     Note bears interest at 6% per year, with the first payment due on 2/17/01
     and the remainder to be paid in annual installments through February 17,
     2004.  Nothing in this Separation Agreement and General Release shall
     operate to enlarge, modify, extend or terminate the Note as contemplated
     hereby and Cobb's payment obligations thereunder shall continue to remain
     in full force and effect.

2.   401 K/Retirement Plan
     ---------------------

     Any vested interest held by Cobb in Mannatech's 401(k) Plans shall be
     distributed in accordance with the terms of the plan (the "Plan") and
     applicable law. Cobb shall not be a participant in the Plan after the
     Separation Date, and shall not be entitled to any further contribution for
     any period of time after the Separation Date. Mannatech shall provide Cobb
     under separate cover at his home address information necessary to
     facilitate the transfer or rollover of his 401(k) account. The parties
     agree that the


     approximate value of Cobb's vested interest as of June 14, 2001, is
     $51,932.61.


3.   Return of Equipment.
     -------------------

     Within five (5) days after the Separation Date, Cobb shall return all
     equipment and property in his possession which belongs to Mannatech and all
     documents and any copies of notes, memorandum or any other written material
     that relates or refers to Mannatech, including all files or programs stored
     electronically, provided that Cobb shall not be required to return the
     following property:

          a.  Possession, use and ownership of the Lexus 400 currently owned by
     Mannatech and being driven by Cobb shall be governed by the provisions of
     Paragraph 7 below;

          b.  Ownership of the home computer used by Cobb is hereby transferred
     to Cobb, provided that Cobb shall delete any and all files containing any
     information regarding Mannatech from such computer; and,

          c.  Cobb will return the corporate Platinum American Express card to
     Mannatech.   Cobb will be responsible for all charges incurred on the
     account prior to its return.   Cobb will submit an Expenditure
     reimbursement form in compliance with corporate policy for timely refund of
     all charges made prior to its return, including charges of $1,221.56 for
     maintenance on the LS 400 and one business lunch for $37.38.

4.   Mannatech Payment Obligations.
     -----------------------------

     In consideration for Cobb's Release of claims pursuant to the Employment
     Agreement, Mannatech shall pay to Cobb Nine Hundred Thousand Dollars
     ("$900,000.00"), payable in thirty-six (36) monthly installments of
     $25,000.00 ("Payment Installment"), beginning on July 16th, 2001 and
     payable thereafter on the 15th date of each month, until paid in full.  In
     the event the 15th calendar date falls on a weekend or holiday, the Payment
     Installment shall be made on the next business day in which banks are open
     for business. The Payment Installment shall be made by written check to
     Cobb with a written accounting reflecting the gross amounts paid and mailed
     to Cobb at his residence at 620 N. Coppell Road, Apt. 307, Coppell, Texas
     75019.  If Cobb hereafter elects to change the instructions set forth
     herein, he shall provide written notice to Mannatech specifying the


     new instructions for delivery of funds at least fourteen (14) days in
     advance of the installment due date. Cobb may elect to have the Payment
     Installment paid by wire transfer, provided that, if such election is made,
     Mannatech may deduct $50.00 per wire transfer to cover the costs of such
     transfer. The foregoing payments are in lieu of, settlement of and
     satisfaction of all Severance Payments required under the Employment
     Agreement, specifically including those defined and required to be paid
     under paragraphs 8.1(6) & 8.1(17) of the Employment Agreement and
     constitute a part of the consideration under this Agreement.
             .
5.   COBRA/Health Insurance.
     ----------------------

     Cobb and his dependents shall have the right to continue applicable medical
     and dental insurance coverage pursuant to COBRA.  Mannatech shall provide
     under separate cover to Cobb at his home address information regarding
     COBRA election.  Cobb shall be responsible for payment of COBRA premiums
     directly to the insurance company(ies), pursuant to the provisions of COBRA
     and the insurance plans in question.  However, Mannatech agrees to
     reimburse Cobb for any premiums paid by him for continuation of health
     coverage for Cobb and his dependents (including his spouse) under
     Mannatech's group health plan, if any, pursuant to any COBRA continuation
     of coverage provisions, for a period not to exceed 18 months.  To obtain
     this reimbursement, Cobb shall provide notice of payment to Mannatech.
     Mannatech shall reimburse Cobb for such premiums within 15 days of receipt
     of such notice.

6.   Option Agreement.
     ----------------

     As further consideration to Cobb, Mannatech and Cobb agree to execute a
     Stock Option Agreement pursuant to the Mannatech 1997  Stock Option Plan
     (the "Plan"), which shall provide for the grant of options (the "Options")
     exercisable to acquire the capital common stock of Mannatech, valid for a
     period of ten (10) years from the date of grant, which shall be one day
     after the Separation Date (the "Exercise Period"), in the respective number
     of shares and respective exercise prices as follows:

     Exercise Price        Number  of Shares
     --------------        -----------------
     $2.25                       10,000

     $4.00                       50,000


     Mannatech represents and warrants that the Options and the underlying
     shares issued pursuant to the Plan are issued pursuant to a Registration
     Statement on Form S-8 that has been declared effective by the Securities
     and Exchange Commission, and that such Registration Statement shall remain
     effective until the earlier of the expiration of the Exercise Period or
     when all of the Options granted have been exercised. The provisions of this
     paragraph shall supercede the requirements of the Employment Agreement
     regarding the conversion of stock options to warrants, including those
     requirements of Paragraph 8.1(16) (iii) of the Employment Agreement. All
     stock options owned by Cobb respecting stock in Mannatech and Internet
     Health Group, Inc. shall terminate on the Separation Date, and shall be
     null and void and of no effect.    The Stock Option Agreement is attached
     hereto as to form and content as Attachment "A".

7.   Vehicle Lease/Transfer of Ownership.
     -----------------------------------

     At the time of the execution of this Agreement, Cobb is driving a Lexus LS
     400 automobile ("Lexus") that is leased by Mannatech and/or Cobb, ("the
     Auto Lease").  Mannatech agrees to transfer free and clear title to the
     Lexus to Cobb upon the termination of the Auto Lease.  Until the
     termination of the Auto Lease, Mannatech will keep the lease payments
     current, and Cobb shall have full use and enjoyment of the vehicle, while
     maintaining the same in good repair and keeping the same insured for its
     replacement cost.  Mannatech reserves the right to transfer title of the
     Lexus prior to the end of the Auto Lease term, such transfer to occur upon
     prior written notice to Cobb.

8.   Purchase of Mannatech Products.
     ------------------------------

     Mannatech agrees that, during the term that Cobb receives Payment
     Installments hereunder, he shall be permitted to purchase Mannatech
     products at the same costs charged to Mannatech employees; provided that,
     such purchases are limited to Cobb and his immediate family's personal use
     and may not be resold by him.  All such purchases shall be made by Cobb
     providing written notice (including email or facsimile) to the
     administrative assistant of the Chief Executive Officer as to the items
     needed and the address for delivery and shall include a valid credit card
     (accepted by Mannatech) to which payment shall be charged.

9.   Reasonable Availability.
     -----------------------


     The Parties agree that Cobb shall hold himself open to consult, provide
     information or assistance, or otherwise cooperate with Mannatech as
     specified in this paragraph, two (2) hours per month (at no charge) during
     the period under which Payment Installments are made, as follows: two (2)
     hours per month shall, if unused, carry over from month to month, up to a
     maximum of six (6) hours in any month, at no charge to Mannatech ("Allotted
     Time").  The Allotted Time available in any month during the period under
     which Payment Installments are made may be used within that month or
     accrued as stated and limited above.  Cobb shall keep an accurate record of
     his time expended in performing services for Mannatech and shall submit
     monthly time records to the Chief Financial Officer of Mannatech.  The
     Parties acknowledge that after the Separation Date, Cobb may undertake
     other business activities which are not precluded by this Agreement which
     may require devotion of his full time.  Therefore, the Parties agree that
     any request of Cobb's time by Mannatech pursuant to this paragraph shall
     take into consideration Cobb's other previously scheduled commitments or
     employment (which may be full time), and both Parties shall attempt to
     accommodate the scheduling needs of the other (which may be at times and on
     days which are not ordinary business times of Mannatech) in connection with
     the provisions of this paragraph.  The Parties further agree that
     consultations with Cobb shall be by telephone whenever possible.  Mannatech
     recognizes that post-separation date services shall not be deemed to
     constitute employment, but instead shall be deemed to constitute business
     consulting services

10.  General Releases.
     ----------------

     In consideration of the premises, covenants and other valuable
     consideration provided by Mannatech in this Agreement, and specifically in
     exchange for the promises and consideration provided by Mannatech in
     paragraphs 4, 5, 6, 7, 8, and 9 and subject thereto, Cobb hereby releases
     Mannatech and its employees, officers, agents, directors, shareholders,
     representatives, plan administrators, attorneys, subsidiaries and
     Affiliates, collectively referred to as "Mannatech Releasees," from any and
     all claims, causes of action, losses, obligations, liabilities, damages,
     judgments, costs, expenses (including attorneys fees) of any kind
     whatsoever, including breach of express or implied contract or implied
     covenant of good faith and fair dealing and occurring in any capacity
     whatsoever including, but not limited to, disputes or claims arising out of
     Cobb's hiring, employment or termination of such employment with Mannatech,
     including but not limited to disputes arising under the Employment
     Agreement between the Parties, or arising out of any act


     committed or omitted during or after the existence of such employment
     relationship, including any disputes regarding compensation, bonus, stock
     or options and all obligations of the Employment Agreement. This Release
     also includes but is not limited to claims at law or equity or sounding in
     contract (express or implied) or tort arising under federal, state or local
     laws prohibiting age, sex, race, national origin, disability, veteran or
     any other forms of discrimination (including but not limited to the Age
     Discrimination in Employment Act, the Americans with Disabilities Act,
     Title VII of the Civil Rights Act of 1964, the Rehabilitation Act of 1973,
     as well as any applicable state fair employment practices laws), claims
     arising under the Fair Labor Standards Act, the National Labor Relations
     Act, the Worker Adjustment and Retraining Notification Act. Cobb agrees to
     never file any lawsuit asserting any of the claims that are released in
     this paragraph and in this Agreement, generally. This Separation Agreement
     and General Release alone is the surviving and controlling obligation of
     the Parties.

     Mannatech releases Cobb from any and all claims, causes of action, losses,
     obligations, liabilities, damages, judgments, costs, expenses (including
     attorneys' fees) which arise out of actions taken by Cobb while serving
     Mannatech and acting in good faith, and which he had no reasonable cause to
     believe the conduct was unlawful or illegal, including, but not limited to,
     claims under federal, state or local constitution, statute, law, ordinance
     or regulation.  In this regard, Cobb shall be deemed to have acted in good
     faith and/or with reasonable cause to believe his conduct was lawful and
     legal if he acted in reliance on the advice of counsel or opinion of
     outside counsel to Mannatech.  However, Mannatech does not release its
     right to enforce the terms of this Agreement.

11.  Agreement Not to Seek Reemployment.
     ----------------------------------

     In further consideration of the payment obligation , specifically in
     paragraphs 4,5,6,7 8, 9, and 10 Cobb agrees that Mannatech, its Affiliates
     and the Mannatech Releases have no obligation to employ, hire, or rehire
     him, to consider him for hire, or to deal with him in any respect at any
     location, office, or place of business with regard to future employment or
     potential employment.  Accordingly, Cobb agrees that (i.) he will not ever
     apply for or otherwise seek employment by Mannatech or its Affiliates at
     any time in the future, at any location, office, or place of business, and
     (ii.) his forbearance to seek future employment as described herein is
     purely contractual and is in no way involuntary, discriminatory, or
     retaliatory.


12.  Noncompetition.
     --------------

     In further consideration of the premises, covenants and other valuable
     consideration provided by Mannatech in this Agreement, and specifically in
     exchange for the promises and consideration provided by Mannatech herein
     and subject thereto, Cobb further agrees as follows:

     (a)  Cobb shall not, directly or indirectly for himself or for others, in
          any geographic area or market where Mannatech or any of its Affiliates
          are conducting any business as of the date of the termination of the
          employment relationship or have during the previous twelve months
          conducted such business:

          (i)   Engage in any business competitive with the business conducted
                by Mannatech;

          (ii)  Render advice or services to, or otherwise assist, any other
                person, association or entity who is engaged, directly or
                indirectly, in any business competitive with the business
                conducted by Mannatech with respect to such competitive
                business; or

          (iii) Induce any employee of Mannatech or any of its Affiliates to
                terminate his or her employment with Mannatech or such
                Affiliates, or hire or assist in the hiring of any such employee
                by any person, association, or entity not affiliated with
                Mannatech, provided; however, that Cobb shall be free to hire
                Kimberly Sadler.

     (b)  The noncompetition obligations contained herein shall apply throughout
          the duration of the period during which Cobb is receiving any payment
          or benefits pursuant to this Agreement.

     (c)  Cobb understands that the restrictions set forth above may limit his
          ability to engage in certain businesses anywhere in the world during
          the period provided for above, but acknowledges that he will receive
          sufficiently high remuneration and other benefits under this Agreement
          to justify such restriction. Cobb acknowledges that money damages
          would not be a sufficient remedy for any breach of his noncompetition
          obligations hereunder by Cobb, and Mannatech shall be entitled to
          enforce the provisions of these noncompetition obligations by
          terminating any payments then owing to him under this Agreement and/or
          to


          specific performance and injunctive relief as remedies for such
          breach of the noncompetition obligations contained herein, but shall
          be in addition to all remedies available at law or in equity to
          Mannatech, including without limitation, the recovery of damages from
          Cobb and Cobb's agents involved in such breach and remedies available
          to Mannatech pursuant to other agreements with Cobb.

     (d)  It is expressly understood and agreed that Mannatech and Cobb consider
          the restrictions contained in this Agreement to be reasonable and
          necessary to protect the proprietary information of Mannatech.
          Nevertheless, if any of the aforesaid restrictions are found by a
          court having jurisdiction to be unreasonable, or overly broad as to
          geographic area or time, or otherwise unenforceable, the parties
          intend for the restrictions therein to be modified by such court so as
          to be reasonable and enforceable and, as so modified by the court, to
          be fully enforced, and the remaining provisions of the noncompetition
          obligations contained herein and the remainder of this Agreement shall
          not be affected thereby, and shall remain in full force and effect.

     (e)  Nothing in this Agreement shall prevent Cobb from practicing as a
          Certified Public Accountant, or any other gainful employment,
          including employment as a financial executive, provided that the
          business operations of Cobb or any employer are not in direct or
          indirect competition with Mannatech. To be in competition with
          Mannatech, the business operations of Cobb or any employer of Cobb
          must involve the sale of products that are competitive with Mannatech.

13.  Non-Disclosure of Trade Secrets.
     -------------------------------

     In further consideration of the premises, covenants and other valuable
     consideration provided by Mannatech in this Agreement, and specifically in
     exchange for the promises and consideration provided by Mannatech in
     paragraphs 4, 5, 6, 7, 8, 9, 10, 11 and 12 and subject thereto, Cobb
     further agrees as follows:

     (a)  All information, ideas, concepts, improvements, discoveries, and
          inventions, whether patentable or not, which are conceivable, made,
          developed, or acquired by him, individually or in conjunction with
          others, during his employment by Mannatech (whether during business
          hours or otherwise and whether on


          Mannatech's premises or otherwise) that relate to Mannatech's
          business, products, or services (including, without limitation, all
          such information relating to corporate opportunities, research,
          financial and sales data, pricing terms, evaluations, opinions,
          interpretations, acquisitions, prospects, the identity of customers or
          their requirements, the identity of key contacts within the customer's
          organizations or within the organization of acquisition prospects, its
          Independent Associates' names, addresses, phone numbers and rank in
          the organization, or marketing and merchandising techniques,
          prospective names, and marks) shall be disclosed to Mannatech and are
          and shall be the sole and exclusive property of Mannatech. Moreover,
          all documents, drawings, memoranda, notes, records, files,
          correspondence, manuals, models, specifications, computer programs,
          electronic mail, voice mail, electronic databases, maps, and all other
          writings or materials of any type embodying any of such information,
          ideas, concepts, improvements, discoveries, and inventions are and
          shall be the sole and exclusive property of Mannatech. Upon execution
          hereof or within a reasonable period of time thereafter, Cobb shall
          promptly deliver the same and all copies thereof, to Mannatech, if
          applicable.

     (b)  Cobb will not, at any time, make any unauthorized disclosure of any
          confidential business information or trade secrets of Mannatech of its
          Affiliates, or make any use thereof. Affiliates of Mannatech shall be
          third party beneficiaries of Cobb's obligations under this section. As
          a result of Cobb's employment by Mannatech, Cobb may also from time to
          time have had access to, or knowledge of, confidential business
          information or trade secrets of third parties, such as customers,
          suppliers, partners, joint venturers, and the like, of Mannatech and
          its Affiliates. Cobb also agrees to preserve and protect the
          confidentiality of such third party confidential information and trade
          secrets to the same extent, and on the same basis, as Mannatech's
          confidential business information and trade secrets. Cobb shall
          refrain from publishing any oral or written statements about
          Mannatech, any of its Affiliates, or any of such entities' officers,
          employees, agents, Independent Associates or representatives (i) that
          are slanderous, libelous, or defamatory, or (ii) that disclose private
          or confidential information about Mannatech, any of its Affiliates, or
          any of such entities' business affairs, officers, employees, agents,
          or representatives, or (iii) that constitute an intrusion into the


          seclusion or private lives of Mannatech, any of its Affiliates, or any
          of such entities' officers, employees, agents, or representatives, or
          (iv) that give rise to unreasonable publicity about the private lives
          of Mannatech, any of its Affiliates, or any of such entities'
          officers, employees, agents, or representatives, or (v) that place
          Mannatech, any of its Affiliates, or any of such entities' officers,
          employees, agents, or representatives in a false light before the
          public, or (vi) that constitute a misappropriation of the name or
          likeness of Mannatech, any of its Affiliates, or any of such entities'
          officers, employees, agents, or representatives. A violation or
          threatened violation of this prohibition may be enjoined by the
          courts.

     (c)  If, during Cobb's employment by Mannatech, Cobb had created any work
          of authorship fixed in any tangible medium of expression, which is the
          subject matter of copyright (such as videotapes, written
          presentations, acquisitions, computer programs, electronic mail, voice
          mail, electronic databases, drawings, maps, architectural renditions,
          models, manuals, brochures, or the like) relating to Mannatech's
          business, products, or services, whether such work was created solely
          by Cobb or jointly with others (whether during business hours or
          otherwise and whether on Mannatech's premises or otherwise); Mannatech
          shall be deemed the author of such work if the work is not prepared by
          Cobb within the scope of his employment but is specially ordered by
          Mannatech as a contribution to a collective work, as a part of a
          motion picture or other audiovisual work, as a translation, as a
          supplementary work, as a compilation, or as an instructional text, and
          the work shall be considered to be work made for hire and Mannatech
          shall be the author of the work. If such work was neither prepared by
          Cobb within the scope of his employment nor a work specially ordered
          that is deemed to be a work made for hire, then Cobb hereby agrees to
          assign, and by these presents does assign, to Mannatech all of his
          worldwide right, title, and interest in and to such work and all
          rights of copyright therein.

     (d)  Cobb shall assist Mannatech and its nominee, at any time, in the
          protection of Mannatech's worldwide right, title and interest in and
          to information, ideas, concepts, improvements, discoveries and
          inventions, and its copyrighted works, including without limitation,
          the execution of all formal assignment documents


          requested by Mannatech or its nominee and the execution of all lawful
          oaths and applications for patents and registration of copyright in
          the United States and foreign countries.

     (e)  Cobb acknowledges that money damages would not be sufficient remedy
          for any breach of this section by Cobb, and Mannatech shall be
          entitled to enforce the provisions of this section by terminating any
          and all payments then owing to Cobb under this Agreement and/or to
          specific performance and injunctive relief as remedies for such breach
          or any threatened breach. Such remedies shall not be deemed the
          exclusive remedies for a breach of this section, but shall be in
          addition to all remedies available at law or in equity to Mannatech,
          including the recovery of damages from Cobb and his agents involved in
          such breach and remedies available to Mannatech pursuant to other
          agreements with Cobb.

14.  Tax Liability.
     -------------

          Mannatech makes no representations regarding the taxability of the
     payment consideration  and/or the exercise of Options  conferred or to be
     delivered hereunder, and Cobb hereby agrees that he is solely responsible
     for all tax obligations, if any, including, but not limited to, all
     reporting and payment obligations, which may arise as a consequence of such
     payments and/or the exercise of any such Options.  Cobb hereby agrees to
     indemnify and hold Mannatech and the Mannatech Releases harmless from and
     against any and all loss, cost, damage or expense, including, without
     limitation, attorneys' fees, incurred by Mannatech and the Mannatech
     Releases, arising out of the tax treatment of any payments and/or the
     exercise of any Options received by Cobb as a result of this Agreement.

15.  Non-Disparagement.
     -----------------

          Cobb and Mannatech agree that they will not disparage each other or
     their respective Affiliates.  In respect to any inquiries from individuals
     who are not employed with Mannatech concerning the termination of the
     employment relationship between Cobb and Mannatech, the Parties will
     respond to the effect that "Patrick Cobb resigned to pursue other career
     opportunities."  The Parties shall issue a press release regarding Cobb's
     resignation from Mannatech as Executive Vice President of International
     Finance in the form set forth in Attachment "B" hereto ("Press Release").
     Such Press Release


     shall not be issued prior to the Separation Date, and shall be the sole
     public communication by Officers and Directors of Mannatech regarding the
     severance of Cobb.

16.  Benefit to the Estate.
     ---------------------

          In the event of Cobb's death, this Agreement shall operate in favor of
     his estate ("Estate") and all payments, obligations and consideration as
     contemplated hereby shall continue to be performed in favor of his Estate.

17.  Breach by Mannatech.
     -------------------

          Should Mannatech default in timely payment on the due date of any
     payment or amount due under this Agreement, Cobb may give written notice of
     such default to the persons specified in or pursuant to this Agreement to
     receive notice on behalf of Mannatech.  Mannatech shall have fifteen (15)
     calendar days after the receipt of such notice of default to cure any
     payment default.  Should Mannatech fail to cure any payment default within
     fifteen (15) calendar days after such payment default notice is so
     received, the entire balance remaining due and payable to Cobb under this
     Agreement shall be accelerated and all amounts remaining unpaid under this
     Agreement by Mannatech to Cobb shall become immediately due and payable.
     After the due date, whether by acceleration or otherwise, unpaid payments
     then due and payable by Mannatech to Cobb shall accrue interest at the
     highest lawful rate chargeable in the State of Texas.

18.  Breach by Cobb.
     --------------

          In the event Mannatech believes that Cobb has breached any material
     term or provision of this Agreement, Mannatech shall provide written notice
     to Cobb identifying the provision that Mannatech asserts has been breached
     by Cobb and demanding cure and performance of such term or provision.  Cobb
     shall have fifteen (15) calendar days after receipt of such notice to cure
     such breach and/or to perform such term or provision, and in the event he
     fails to timely do so, all amounts which otherwise would be payable by
     Mannatech to Cobb under this Agreement shall cease and Mannatech shall be
     excused and no further amounts to him under this Agreement.  Provided
     however, that notwithstanding such cessation of Mannatech's obligations,
     Cobb's Confidentiality, Non-Competition and Non-Solicitation covenants as
     identified in paragraphs 12 & 13 herein shall continue in full force and
     effect as specified in this Agreement.  In addition to the


     remedies referenced above, Mannatech may bring suit in a court of competent
     jurisdiction to enforce any material term or provision of this Agreement,
     and in the event said court determines that Cobb has breached and/or failed
     to perform any material term or provision of this Agreement, damages and
     injunctive relief may be issued against him and he shall be obligated to
     pay reasonable attorneys' fees, costs and expenses incurred by Mannatech.

     19.  Enforceability.
          --------------

          If Cobb or anyone acting on his behalf brings suit against Mannatech
     seeking to declare any term of this Agreement void or unenforceable, and if
     one or more material terms of this Agreement are ruled by a court of
     competent jurisdiction to be void or unenforceable or subject to reduction
     or modification, Mannatech may choose to cancel all of the remaining terms
     of this Agreement and recover from Cobb (or Cobb's successors or assigns)
     the value of anything paid by Mannatech in exchange for this Agreement.  If
     the Agreement is not canceled by Mannatech, then the remaining terms of
     this Agreement, including any modification or reduction by the court, shall
     continue in full force or effect.

20.  Representation by Counsel
     -------------------------

          The Parties acknowledge that this Agreement has been drafted,
     prepared, negotiated and agreed to jointly, with advice of each Party's
     respective counsel, and to the extent that any ambiguity should appear, now
     or at any time in the future, latent or apparent, such ambiguity shall not
     be resolved or construed against either Party.

21.  No Admission of Liability or Wrongdoing.
     ---------------------------------------

          This Agreement shall not in any way be construed as an admission by
     either Party of any acts of wrongdoing, violation of any statute, law or
     legal or contractual right.  Rather, Mannatech and Cobb specifically deny
     and disclaim they have any liability to the other for any claims asserted
     or arising out of the employment relationship or termination of employment
     relationship, but are willing to enter into this Agreement described herein
     to definitively resolve once and forever this matter, and to avoid the
     cost, expense and delay of litigation.

22.  Review by Legal Counsel.
     -----------------------


          Cobb and Mannatech represent and agree that they have thoroughly
     discussed all aspects of this Agreement and the effect of same with their
     attorneys, that they have had a reasonable time to review the Agreement,
     that they fully understand all the provisions of the Agreement and are
     voluntarily entering into this Separation Agreement and General Release.
     Cobb further represents that he has not transferred or assigned to any
     person or entity any claim involving Mannatech or any portion thereof or
     interest therein.

23   Confidentiality.
     ---------------

          Each of the Parties agree to keep confidential the specific terms of
     this Agreement, and shall not disclose the terms of this Agreement to any
     person except the financial, tax and legal advisors of Cobb and Mannatech
     (and the Board of Directors of Mannatech) unless required to disclose the
     same to others by legal process, in which event the Party so ordered shall
     first give notice to the other Party and an opportunity to seek a
     protective order.  This Agreement may be disclosed or appended as an
     exhibit to any securities filing required to be made by Mannatech, however,
     after having been so disclosed or appended, Cobb shall have no further duty
     of confidentiality concerning this Agreement, as set forth in this
     paragraph.

24   Notices.
     -------

          All notices and other communications hereunder will be in writing.
     Any notice or other communication hereunder shall be deemed duly given if
     it is sent by registered or certified mail, return receipt requested,
     postage prepaid, and addressed to the intended recipient as set forth:

     If to Cobb:
     Mr. Patrick Cobb
     620 N. Coppell Rd.
     Apt. 307
     Coppell, Texas 75019


     If to Mannatech:
     Mr. Robert M. Henry
     Mannatech, Incorporated
     600 S. Royal Lane
     Suite 200
     Coppell, Texas 75019

          Any party may send any notice or other communication hereunder to the
     intended recipient at the address set forth using any other means
     (including personal delivery, expedited courier, messenger services,
     telecopy, telex, ordinary mail or electronic mail), but no such notice or
     other communication shall be deemed to have been duly given unless and
     until it is actually received by the intended recipient.  Any party may
     change the address to which notices and other communications hereunder are
     to be delivered by giving the other party notice in the manner set forth
     herein.

25.  Counterparts.
     ------------

          This Agreement may be executed in multiple counterparts, whether or
     not all signatories appear on these counterparts, and each counterpart
     shall be deemed an original for all purposes.

26.  Governing Law.
     -------------

          This Agreement shall be deemed performable by all Parties in Dallas
     County, Texas and the construction and enforcement of this Agreement shall
     be governed by Texas law without regard to its conflicts of law rules.

27.  Revocation Period.
     -----------------

          Cobb has been given a period of 21 days from the Separation Date to
     review and consider this Agreement before signing it.  He may use as much
     of this 21-day period as he wishes before signing and he is encouraged to
     consult with an attorney before signing this Agreement.  Cobb understands
     that whether or not to consult with an attorney is his decision.  Cobb may
     revoke this Agreement within 7 (seven) days after signing it.  Revocation
     can be made by delivering a written notice of revocation to Mannatech, Inc.
     ATTN: Robert Henry, Chief Executive Officer, 600 South Royal Lane, Suite
     200, Coppell, Texas 75019.  This agreement is subject to review and
     approval by the Board of Directors and its various committees.


     PLEASE READ THIS AGREEMENT CAREFULLY. IT CONTAINS A RELEASE OF ALL KNOWN
     AND UNKNOWN CLAIMS AS SPECIFIED IN PARAGRAPH 10 ABOVE.

     I ACKNOWLEDGE THAT I HAVE CAREFULLY READ THE FOREGOING AGREEMENT, THAT I
     UNDERSTAND ALL OF ITS TERMS, AND THAT I AM ENTERING INTO IT VOLUNTARILY.

     I FURTHER ACKNOWLEDGE THAT I AM AWARE OF MY RIGHTS TO REVIEW AND CONSIDER
     THIS AGREEMENT FOR 21 DAYS AND TO CONSULT WITH AN ATTORNEY ABOUT IT, AND
     STATE THAT BEFORE SIGNING THIS AGREEMENT, I EXERCISE THESE RIGHTS TO THE
     FULL EXTENT THAT I DESIRED.


AGREED TO:

/s/ Patrick Cobb                  Date:  June 21, 2001
- -----------------------------            ---------------------
Patrick Cobb


MANNATECH, INC.


By:    /s/ Robert M. Henry        Date:    June 21, 2001
      -----------------------            ---------------------
      Robert M. Henry
Its:  Chief Executive Officer


STATE OF TEXAS                (S)
                              (S)
COUNTY OF DALLAS              (S)

     Before me, a Notary Public, on this day personally appeared Robert M.
Henry, known to me to be the person whose name is subscribed to the foregoing
instrument and acknowledged to me that the same was the act of Robert M. Henry
on behalf of Mannatech, Inc., and that he has executed the same on behalf of
said corporation for the purposes and consideration therein expressed, and in
the capacity therein stated.

     Given under my hand and seal of office this 21st day of June, 2001.



                                /s/ Vinnie Calvey
                              -------------------------------------------
                              Notary Public in and for the State of Texas


STATE OF TEXAS                (S)
                              (S)
COUNTY OF DALLAS              (S)

     Before me, a Notary Public, on this day personally appeared Patrick Cobb,
known to me to be the person whose name is subscribed to the foregoing
instrument and acknowledged to me that the same was the act of Patrick Cobb, and
that he has executed the same for the purposes and consideration therein
expressed, and in the capacity therein stated.

     Given under my hand and seal of office this 21st day of June, 2001.



                                    /s/ Vinnie Calvey
                              -------------------------------------------
                              Notary Public in and for the State of Texas


                                 Attachment "A"

                      Non-qualified Stock Option Agreement


                                 Attachment "B"

           EXECUTIVE VICE PRESIDENT OF INTERNATIONAL FINANCE RESIGNS

          Coppell, Texas - Mannatech, Inc. has announced the resignation of
          Patrick Cobb, Executive Vice President of International Finance,
          effective June 30, 2001.  Mr. Cobb intends to pursue and develop
          private business ventures.

     Mannatech, Inc. develops proprietary nutritional supplements and topical
products, which it sells through a network marketing system through the United
States and Internationally.