Exhibit 16.1
October 18, 2007
U.S. Securities and Exchange Commission
Office of the Chief Accountant
100 F Street, NE
Washington, DC 20549
Re: Mannatech, Incorporated
Dear Sir or Madam:
We have read Item 4.01 of Form 8-K of Mannatech, Incorporated dated October 18, 2007, and agree with the statements concerning our Firm contained in Item 4.01(a). We have no basis to agree or disagree with the statements made by the Registrant in paragraph (b).
Very truly yours,
/s/ Grant Thornton LLP |