Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Clark Natalie Lynne
 2. Date of Event Requiring Statement (Month/Day/Year)
02/24/2010		 3. Issuer Name and Ticker or Trading Symbol
MANNATECH INC [MTEX]
(Last)
(First)
(Middle)
600 S. ROYAL LANE, SUITE 200		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Sr.VP, North America
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

COPPELL, TX 75019		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock, Par Value $0.0001 per share 250
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Right to Purchase Common Stock   (1) 08/22/2010 Common Stock, Par Value $0.0001 per share 4,000 $ 2.63 D  
Right to Purchase Common Stock   (1) 11/16/2016 Common Stock, Par Value $0.0001 per share 12,000 $ 14.99 D  
Right to Purchase Common Stock   (2) 09/05/2017 Common Stock, Par Value $0.0001 per share 3,000 $ 7.31 D  
Right to Purchase Common Stock   (3) 11/19/2018 Common Stock, Par Value $0.0001 per share 1,000 $ 2.5 D  
Right to Purchase Common Stock   (4) 02/23/2020 Common Stock, Par Value $0.0001 per share 5,000 $ 3.56 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Clark Natalie Lynne
600 S. ROYAL LANE
SUITE 200
COPPELL, TX 75019		       Sr.VP, North America  

Signatures

/s/ Stephen D. Fenstermacher, Co-CEO and CFO, by Power of Attorney 03/01/2010
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Fully vested
(2) Two-thirds of the stock options are vested, another one-third of the stock options will vest on September 6, 2010.
(3) One-third of the stock options are vested, another one-third of the stock options will vest on November 20, 2010, and the remaining one-third of the stock options will vest on November 20, 2011.
(4) One-third of the stock options are vested, another one-third of the stock options will vest on February 24, 2011, and the remaining one-third of the stock options will vest on February 24, 2012.

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