Mannatech Reports Record Sales & Earnings for 2005 Annual Operating Income Grows 72%, exceeds $46 million. Coppell, Texas

Mannatech Reports Record Sales & Earnings for 2005

Annual Operating Income Grows 72%,

exceeds $46 million.

Coppell, Texas March 8, 2006 Mannatech, Incorporated (NASDAQ: MTEX) today reported record earnings per share

for the year ended December 31, 2005 of $1.03 per diluted share for an increase of 45%, or $0.32 per diluted share as compared to $0.71 for the same period in 2004. In addition, consolidated net sales grew 32% to $389 million compared to $295

million in 2004 and set a new Company annual sales record. Fourth quarter results included record earnings per share of $0.34 per diluted share up 127% from $0.15 per diluted share for the same period in 2004, and consolidated net sales increased by

20% to $101 million as compared to $84 million for the same period in 2004.

Samuel Caster, Chairman of the Board and Chief Executive Officer, said

Our focus over the past year has included increasing our profitability. Our income from operations for the year ended 2005 increased $19 million, or 72%, to $46 million as compared to $27 million in 2004. We also improved our cost of sales,

our commission rate was lowered versus 2004, and we reduced our overhead costs by two full percentage points. These efforts amplified the effects of our sales increase and allowed us to drive our operating earnings to the highest levels Mannatech

has yet achieved. Our income from operations for the fourth quarter of 2005 rose to 15% of net sales, which shows the potential we believe our company has.

Mr. Caster continued, Our strong performance is a result of our continued effective strategy of delivering exceptional products coupled with outstanding customer service across the globe. We believe our strategy continues to work

well and we plan to innovate to bring more value to our investors and customers worldwide. We see continued growth in our future and are optimistic about our business and industry, as we expect to continue our introduction of new products,

refinement of existing products, and sustained international expansion.

During 2005, Mannatech improved its gross profit margin by reducing cost of

sales, as well as maintaining control of commissions and incentives and overhead costs. Mannatech also maintained a debt-free balance sheet with a strong cash position of over $73 million. Mannatech declared dividends of $0.29 per share in 2005 as

compared to $0.27 per share in 2004. Mannatech intends to continue dividend payments to its shareholders as encouragement of long-term stock ownership.

Fourth Quarter 2005 Results

Mannatech reported the following consolidated

results for its fourth quarter:

For geographical purposes, consolidated net sales by location for each quarter of 2005 were as follows (in millions):

operations in June 2005.

***United Kingdom began selling products in Denmark in August 2005.

2005 Full Year Results

Mannatech reported the following consolidated annual results for 2005:

Consolidated net sales by geographical location for the years ended December 31, were as

** Taiwan began operations in June 2005.

***United Kingdom began selling products in Denmark in August 2005.

The number of new and continuing independent associates and members who purchased our products and packs within the last 12 months are called current associates and members, and by year are as follows:

Based in Coppell, Texas, Mannatech, Incorporated is a wellness solutions provider that develops innovative, high-quality, proprietary nutritional supplements, topical products and weight management products, which are sold through a global

network-marketing system operating throughout the United States and the international markets of Canada, Australia, the United Kingdom, Japan, New Zealand, the Republic of Korea, Taiwan, and Denmark.

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 may,

believes, estimates, shows , sees, optimistic, and plans 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 its expectations, statements, and assumptions reflected in these forward-looking statements are

reasonable, it cautions its 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 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:

(Summary Consolidated Financial Statements to follow)

MANNATECH, INCORPORATED

CONSOLIDATED BALANCE SHEETS

(unaudited and in thousands, except share and per share information)

MANNATECH, INCORPORATED

CONSOLIDATED STATEMENTS OF OPERATIONS

(unaudited and in thousands, except for

per share information)