Image of L-Methionine | C5H11NO2S | Supreme Pharmavet
Chemical FormulaC5H11NO2S
Molecular weight149.208 g/mol
Names and Identifiers
PubChem Link
Traditional NameL-Methionine
CAS Registry Number63-68-3


Methionine is an essential amino acid in humans. As the substrate for other amino acids such as cysteine and taurine, versatile compounds such as SAM-e, and the important antioxidant glutathione, methionine plays a critical role in the metabolism and health of many species, including humans. It is encoded by the codon AUG.

Methionine is also an important part of angiogenesis, the growth of new blood vessels. Supplementation may benefit those suffering from copper poisoning. Overconsumption of methionine, the methyl group donor in DNA methylation, is related to cancer growth in a number of studies. Methionine was first isolated in 1921 by John Howard Mueller.

Useful Links