UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 4
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
( ) Check this box if no longer subject to Section 16.
Form 4 or Form 5 obligations may continue. See Instructions 1(b).
1. Name and Address of Reporting Person
   Fioretti, William
   6333 North Highway 161, Suite 350
   Irving, Texas  75038
   USA
2. Issuer Name and Ticker or Trading Symbol
   Mannatech, Inc.
   MTEX
3. IRS or Social Security Number of Reporting Person (Voluntary)

4. Statement for Month/Year
   July 31, 2000
5. If Amendment, Date of Original (Month/Year)

6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
   ( ) Director (X) 10% Owner ( ) Officer (give title below) ( ) Other
   (specify below)

7. Individual or Joint/Group Filing (Check Applicable Line)
   (X) Form filed by One Reporting Person
   ( ) Form filed by More than One Reporting Person
___________________________________________________________________________________________________________________________________ Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned | ___________________________________________________________________________________________________________________________________| 1. Title of Security |2. |3. |4.Securities Acquired (A) |5.Amount of |6.Dir |7.Nature of Indirect | | Transaction | or Disposed of (D) | Securities |ect | Beneficial Ownership | | | | | Beneficially |(D)or | | | | | | | A/| | Owned at |Indir | | | Date |Code|V| Amount | D | Price | End of Month |ect(I)| | ___________________________________________________________________________________________________________________________________| Common Stock |7/10/0|S | |5,300 |D |$2.28 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/14/0|S | |19,300 |D |$2.19 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/18/0|S | |68,700 |D |$1.98 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/20/0|S | |22,900 |D |$1.94 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/24/0|S | |11,700 |D |$1.835 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/25/0|S | |15,000 |D |$1.72 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/26/0|S | |8,000 |D |$1.75 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/27/0|S | |14,400 |D |$1.44 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/28/0|S | |23,700 |D |$1.42 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/31/0|S | |57,550 |D |$1.49 | | | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |7/31/0|S | |12,300 |D |$1.33 | 2,182,750 | D | | |0 | | | | | | | | | - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock | | | | | | | 1,341,770 | I(1)|Family Limited | | | | | | | | | |Partnership | - -----------------------------------------------------------------------------------------------------------------------------------| ___________________________________________________________________________________________________________________________________| ___________________________________________________________________________________________________________________________________ Table II -- Derivative Securitites Acquired, Disposed of, or Beneficially Owned | ___________________________________________________________________________________________________________________________________| 1.Title of Derivative |2.Con- |3. |4. |5.Number of De |6.Date Exer|7.Title and Amount |8.Price|9.Number |10.|11.Nature of| Security |version |Transaction | rivative Secu |cisable and| of Underlying |of Deri|of Deriva |Dir|Indirect | |or Exer | | | rities Acqui |Expiration | Securities |vative |tive |ect|Beneficial | |cise | | | red(A) or Dis |Date(Month/| |Secu |Securities |(D)|Ownership | |Price of| | | posed of(D) |Day/Year) | |rity |Benefi |or | | |Deriva- | | | |Date |Expir| | |ficially |Ind| | |tive | | | | A/|Exer-|ation| Title and Number | |Owned at |ire| | |Secu- | | | | | D |cisa-|Date | of Shares | |End of |ct | | |rity |Date |Code|V| Amount | |ble | | | |Month |(I)| | ___________________________________________________________________________________________________________________________________| | | | | | | | | | | | | | | | ___________________________________________________________________________________________________________________________________|
Explanation of Responses: (1) Mr. Fioretti is the general partner of the Fioretti Family Limited Partnership. Mr. Fioretti, his wife and trusts for the benefit of his children are the limited partners. SIGNATURE OF REPORTING PERSON /s/ William Fioretti - --------------------- William Fioretti DATE August 4, 2000