Tex. Civil Practice and Remedies Code § 138.002

(a) Except as otherwise provided by this section, a manufacturer, seller, trade association, livestock producer, or agricultural producer is not liable under any law of this state for any claim arising out of weight gain or obesity, a health condition associated with weight gain or obesity, or any other generally known condition allegedly caused by or allegedly likely to result from the long-term consumption of food, including:

(1) an action brought by a person other than the individual on whose weight gain, obesity, or health condition the action is based; and

(2) any derivative action brought by or on behalf of any individual or any representative, spouse, parent, child, or other relative of any individual.

(b) This section does not prohibit a person from bringing:

(1) an action in which:

(A) a manufacturer or seller of a food knowingly and wilfully violates a federal or state statute applicable to the manufacturing, marketing, distribution, advertisement, labeling, or sale of the food; and

(B) the violation is a proximate cause of injury related to an individual's weight gain or obesity or any health condition associated with an individual's weight gain or obesity; or

(2) an action brought:

(A) under Chapter 431, Health and Safety Code; or

(B) by the attorney general under Section 17.47, Business & Commerce Code.

(c) This section does not create a cause of action.