A "non-essential" amino acid, glycine is necessary for the synthesis of bile acids, nucleic acids and other amino acids. Glycine aids in skin and tissue repair; it is important to central nervous system function.
Glycine is a part of many proteins in plants and animals. It is listed as a nutrient and an antipruritic in the Merck Index, and it is listed in the U.S.P.
Glycine is used to treat bipolar disorders and hyperactivity.