EXHIBIT A
JOINT FILING AGREEMENT
(Pursuant to Rule 13d-1(f)(1) under the Securities Exchange Act of 1934, as
amended)
Each of the undersigned hereby agrees to be included in the
filing of the Schedule 13D dated October 29, 1999 and any subsequent amendments
hereto, relating to the Common Stock, $0.0001 par value per share, of Mannatech,
Incorporated, a Texas corporation, beneficially owned by each of the
undersigned.
October 29, 1999
/s/ XXXXXX X. XXXXXX /s/ HARLEY XXXXXXXX XXXXXXXX, XX., M.D.
---------------------------- ---------------------------------------
XXXXXX X. XXXXXX HARLEY XXXXXXXX XXXXXXXX, XX., M.D.
/s/ XXXXXXX X. XXXXXXXX /s/ XXXX XXXXXXX, XX.
---------------------------- ---------------------------------------
XXXXXXX X. XXXXXXXX XXXX XXXXXXX, XX.
THE XXXXXXXX FAMILY PARTNERSHIP
By: /s/ Xxxxxxx X. Xxxxxxxx, /s/ XXXXX XXXXXXX
------------------------ ---------------------------------------
Xxxxxxx X. Xxxxxxxx, XXXXX XXXXXXX
its General Partner
/s/ XXXXXXX X. XXXXXXXX /s/ XXXXXX XXX XXXXXXX, XX.
---------------------------- ----------------------------
XXXXXXX X. XXXXXXXX XXXXXX XXX XXXXXXX, XX.
/s/ XXXXXX X. XXXXXXX
----------------------------
XXXXXX X. XXXXXXX
EXHIBIT A
