Mannatech Names New SVP and Chief Marketing Officer Terri Maxwell brings over 20 years of sales and marketing experience Coppell, Texas

Mannatech Names New SVP and Chief Marketing Officer

Terri Maxwell brings over 20 years of sales and marketing experience

Coppell, Texas, September 2, 2008 Mannatech, Incorporated (NASDAQ MTEX), a leading developer and provider of dietary supplements and skin care solutions, today announced that Terri Maxwell has

joined Mannatech as senior vice president and chief marketing officer. Ms. Maxwell will focus on building Mannatech s brand reputation, building powerful tools to support associates ability to promote products, improving the web

experience for associates and customers, and supporting international growth and market expansion.

Ms. Maxwell founded a marketing consulting

firm, LATIMARK , in 2001 after leading Prodigy s $35M internet marketing subsidiary to record setting growth in the late 1990 s. In addition to extensive experience in channel strategy and marketing, Terri also held top sales and

marketing positions with consumer goods leader Jostens and CRM upstart Relizon/Epsilon. As a marketing consultant, Terri delivered insightful, results-driven solutions to numerous Fortune 100 and Global 1000 companies, including

consumer-marketing leaders such as Target, Nokia, Texas Instruments, as well as business-to-business giants Fujitsu, Alcatel and Burlington Northern Railway.

Wayne Badovinus, president and chief executive officer said, Brand recognition is a major focal point for us as we look to the future. We are excited to have Terri join our team as she brings key experience

driving brand recognition and dynamic product marketing programs.

Ms. Maxwell added, Wayne Badovinus was the real game changer for me to

come on board. His proven experience growing companies with highly visible brand identities made Mannatech the perfect choice for me.

Ms. Maxwell graduated with distinction from Indiana University with an education degree. Terri received a Masters of Business Administration from University of Texas at Dallas, receiving highest honors in class.

Mannatech, Incorporated, is a global wellness

solutions provider of innovative, high-quality, proprietary nutritional supplements, topical and skin care products, and weight management products sold through independent associates and members located in the United States and the international

markets of Canada, Australia, the United Kingdom, Japan, New Zealand, the Republic of Korea, Taiwan, Denmark, Germany, South Africa.

release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation

These forward-looking statements generally can be identified by use of phrases or terminology such as intend or other similar words or the

negative of such terminology. Similarly, descriptions of Mannatech s objectives, strategies, plans, goals or targets contained herein are also considered forward-looking statements. Mannatech believes this release should be read in conjunction

with all of its filings with the United States Securities and Exchange Commission and cautions its readers that these forward-looking statements are subject to certain events, risks, uncertainties, and other factors. Some of these factors include,

among others, Mannatech s inability to attract and retain associates and members, increases in competition, litigation, regulatory changes, and its planned growth into new international markets. Although Mannatech believes that the

expectations, statements, and assumptions reflected in these forward-looking statements are reasonable, it cautions readers to always consider all of the risk factors and any other cautionary statements carefully in evaluating each forward-looking

statement in this release, as well as those set forth in its latest Annual Report on Form 10-K and Quarterly Report on Form 10-Q, and other filings filed with the United States Securities and Exchange Commission, including its current reports on

Form 8-K. All of the forward-looking statements contained herein speak only as of the date of this release.

Contact Information:

Gary Spinell, Vice President Finance &

Corporate Communications

Corporate website: www.mannatech.com