Mannatech, Incorporated(NASDAQ: MTEX), the founder of the M5MSM (Mission 5 MillionSM) social entrepreneurial movement, the pioneer of nutritional glycobiology and the leading innovator of naturally-sourced supplements based on Real Food Technology® solutions, announces that company founder, Sam Caster, has voluntarily chosen to end his consulting relationship with the company to use his skills to focus on his calling of caring for malnourished children throughout the world. “I know that our management and associates respect Sam’s decision to follow his dream,” said Dr. Robert Sinnott, CEO and Chief Science Officer at Mannatech. “This is a time when Mannatech is well-positioned for the future with a strong committed management team, new patented proprietary products and a great team of associate leaders working in 24 countries around the world.” “Our commitment to Social Entrepreneurship and Mission 5 Million (M5M) remains as strong as ever,” said Dr. Sinnott. Mission 5 Million, or M5M, represents Mannatech’s mission to fight global malnutrition by nourishing the world with Real Food Technology supplementation while empowering and rewarding the lives of those who champion the cause. The company’s vision is to impact the global epidemic of childhood malnutrition by linking 5 million consumers of Real Food Technology supplementation with 5 million children in need. As a Social Entrepreneurship company, Mannatech has created a nutritional supplement powder, PhytoBlend™, specifically designed to help in the fight against global malnutrition. Anytime a consumer purchases a Mannatech product, a donation of nutritional supplementation is provided for a child in need. “This is Sam’s personal decision based on his well-known and proven passion for helping nutritionally challenged children,” said J. Stanley Fredrick, Mannatech board chairman. “We have long known about that commitment and wish him only the best in his endeavor.” About Mannatech Mannatech, Incorporated, develops high-quality health, weight and fitness, and skin care products that are based on the solid foundation of nutritional science and development standards. Mannatech is dedicated to its platform of Social Entrepreneurship based on the foundation of promoting, aiding and optimizing nutrition where it is needed most around the world. Mannatech’s proprietary products are available through independent sales Associates around the globe, including the United States, Canada, South Africa, Australia, New Zealand, Austria, Denmark, Germany, Norway, Sweden, the Netherlands, the United Kingdom, Japan, Taiwan, Singapore, Estonia, Finland, the Republic of Ireland, Czech Republic, the Republic of Korea, Mexico, Namibia, Hong Kong and Ukraine. For more information, visit Mannatech.com. Please note: This 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 Reform Act of 1995. 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.