Exhibit 99.1

Mannatech Inc. Announces Another Record-Breaking Year of Annual Sales & Profit

Coppell, TX – March 9, 2005 – Mannatech, Incorporated (NASDAQ: MTEX) today announced the achievement of new annual sales and profit records for 2004. Consolidated net sales reached a new high of $294.5 million, an increase of $103.5 million, or 54.2%, as compared to 2003. Mannatech’s net income of $19.6 million more than doubled as compared to the prior year with an increase of $10.8 million, or 122.4%, and earnings per share of $0.71 (diluted) increased 108.8% as compared to 2003. Annual historical sales by market are shown in the table below.

	2002				2003				2004
United States	$	105.0	74.5	%	$	127.8	67.0	%	$	192.5	65.4	%
Canada	$	16.4	11.6	%	$	16.7	8.7	%	$	22.2	7.5	%
Australia	$	6.6	4.7	%	$	15.6	8.2	%	$	30.6	10.4	%
United Kingdom	$	1.6	1.1	%	$	5.0	2.6	%	$	10.5	3.6	%
Japan	$	9.0	6.4	%	$	18.6	9.7	%	$	24.5	8.3	%
New Zealand	$	2.3	1.7	%	$	7.3	3.8	%	$	12.9	4.4	%
South Korea	$	—	—	%	$	—	—	%	$	1.3	0.4	%
Total	$	140.9	100.0	%	$	191.0	100.0	%	$	294.5	100.0	%

Fourth quarter results also included a new consolidated net sales record of $84.2 million for Mannatech, which was an increase of $29.9 million, or 55.1%, as compared to the same period in 2003. Fourth quarter net income was $4.0 million, or $0.15 earnings per share (diluted), which was an increase of 21.9 % over the fourth quarter of 2003. Net income for the fourth quarter included one-time non-cash charge, totaling $3.0 million, or $0.07 per diluted share, net of tax, related to Mr. Caster’s sale of 180,000 shares of his common stock to a former employee, Dr. H. Reginald McDaniel. The sale was for a price that was below the fair market value of Mannatech’s stock on the date of the sale. Quarterly sales volumes by market are shown in the table below.

	First Quarter				Second Quarter				Third Quarter				Fourth Quarter
United States	$	36.8	63.0	%	$	49.5	66.6	%	$	51.3	66.1	%	$	54.8	65.2	%
Canada	$	4.7	8.0	%	$	5.8	7.8	%	$	5.6	7.2	%	$	6.1	7.2	%
Australia	$	6.5	11.1	%	$	7.4	10.0	%	$	8.0	10.3	%	$	8.8	10.4	%
United Kingdom	$	2.8	4.8	%	$	2.6	3.5	%	$	2.6	3.3	%	$	2.5	3.0	%
Japan	$	5.0	8.6	%	$	5.9	7.9	%	$	6.5	8.4	%	$	7.1	8.4	%
New Zealand	$	2.6	4.5	%	$	3.1	4.2	%	$	3.4	4.4	%	$	3.8	4.5	%
South Korea	$	—	—	%	$	—	—	%	$	0.2	0.3	%	$	1.1	1.3	%
Total	$	58.4	100.0	%	$	74.3	100.0	%	$	77.6	100.0	%	$	84.2	100.0	%

Mr. Caster commented on the new all time high record sales volumes for the periods, stating “We are extremely pleased with the financial gains and continued strength shown throughout 2004, and also are delighted with the impressive sales momentum generated by our 369,000 current independent Associates and members around the world. Our groundbreaking glyconutritional technology continues to bring hope, health, and opportunity to people in record numbers and we believe that we are just scratching the surface of the potential of Mannatech.”

The number of current Mannatech independent Associates and members is as follows:

	For the year ended December 31,
	2002			2003			2004
New	91,000	45.6	%	134,000	50.8	%	178,000	48.2	%
Continuing	109,000	54.4	%	130,000	49.2	%	191,000	51.8	%
Total	200,000	100.0	%	264,000	100.0	%	369,000	100.0	%

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About Mannatech, Incorporated

Mannatech, based in Coppell, Texas, is a wellness solution provider that sells its products through a global network-marketing system throughout the United States and the international markets of Canada, Australia, the United Kingdom, Japan, New Zealand, and South Korea. For additional information about Mannatech, please visit its corporate website: www.mannatech.com.

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,” 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 SEC 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 SEC, 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:

Stephen Fenstermacher

972-471-6512

IR@mannatech.com

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MANNATECH, INCORPORATED

CONSOLIDATED BALANCE SHEETS

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

	December 31,
	2003			2004
ASSETS
Cash and cash equivalents	$	28,291		$	44,198
Restricted cash		2,140			393
Income tax receivable		—			4,161
Accounts receivable		134			392
Current portion of notes receivable from affiliates		55			144
Inventories		7,861			13,157
Prepaid expenses and other current assets		2,084			3,188
Deferred tax assets		2,363			1,850
Total current assets		42,928			67,483
Property and equipment, net		5,514			10,013
Long-term investments		9,994			17,073
Notes receivable from affiliates, excluding current portion		150			—
Deferred tax assets		631			1,003
Other assets		806			2,774
Total assets	$	60,023		$	98,346
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of capital leases	$	16		$	8
Accounts payable		2,687			2,227
Accrued expenses		19,940			35,037
Deferred revenue		3,142			2,256
Current portion of accrued severance related to former executives		953			375
Total current liabilities		26,738			39,903
Capital leases, excluding current portion		32			26
Accrued severance related to former executives, excluding current portion		359			—
Long-term liabilities		—			530
Long-term royalties due to an affiliate		106			1,658
Deferred tax liabilities		—			4
Total liabilities		27,235			42,121
Commitments and contingencies		—			—
Shareholders’ equity:
Preferred stock, $0.01 par value, 1,000,000 shares authorized, no shares issued and outstanding		—			—
Common stock, $0.0001 par value, 99,000,000 shares authorized, 26,227,171 shares issued and 26,183,422 outstanding in 2003 and 27,115,440 shares issued and 27,041,125 outstanding in 2004		3			3
Additional paid-in capital		24,175			34,917
Retained earnings		9,271			21,672
Accumulated other comprehensive loss		(422	)		195
		33,027			56,787
Less treasury stock, at cost, 43,749 shares in 2003 and 74,315 shares in 2004		(239	)		(562	)
Total shareholders’ equity		32,788			56,225
Total liabilities and shareholders’ equity	$	60,023		$	98,346

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MANNATECH, INCORPORATED

CONSOLIDATED STATEMENTS OF OPERATIONS

(unaudited, in thousands, except per share information)

	Three months ended December 31,						Twelve months ended December 31,
	2003			2004			2003			2004
Net sales	$	54,292		$	84,226		$	191,019		$	294,508
Cost of sales		8,602			12,976			30,884			44,847
Commissions and incentives		22,665			37,524			79,577			132,231
		31,267			50,500			110,461			177,078
Gross profit		23,025			33,726			80,558			117,430
Operating expenses:
Selling and administrative expenses		10,765			13,896			39,993			50,006
Other operating costs		7,973			12,925			26,956			37,840
Severance expense		176			—			2,017			—
Non-cash charge related to affiliate stock sale		—			3,047			—			3,047
Total operating expenses		18,914			29,868			68,966			90,893
Income from operations		4,111			3,858			11,592			26,537
Interest income		134			306			348			735
Interest expense		(23	)		(1	)		(44	)		(17	)
Other income (expense), net		610			781			842			(257	)
Income before income taxes		4,832			4,944			12,738			26,998
Income taxes		(1,513	)		(899	)		(3,948	)		(7,446	)
Net income	$	3,319		$	4,045		$	8,790		$	19,552
Earnings per common share:
Basic	$	0.13		$	0.15		$	0.34		$	0.74
Diluted	$	0.12		$	0.15		$	0.34		$	0.71
Weighted-average common shares outstanding:
Basic		25,996			26,768			25,494			26,436
Diluted		26,695			27,741			26,175			27,491

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