Trimethylglycine

Trimethylglycine (TMG), also known as betaine, is a derivative of the amino acid glycine. TMG can be both a consumer and provider of methyl groups in many different metabolic reactions, most notably in choline metabolism. TMG supplements alleviate the body's need for methyl donors, which may benefit people deficient in methyl donors. In the form of betaine HCl, it is sometimes used to increase stomach acid, although this use is questionable.

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 * Betaine - drugs.com