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S-Adenosyl-L-Methionine (SAMe) Plays a complex role in metabolism, functioning as a methyl group donor ( transmethylation reactions ), precursor of sulphur-containing compounds (transsulfuration pathway) , and in production of polyamines

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Photo by Innerbody Research Though there are other copper peptides, and a few peptide complexes may contain copper as an ingredient, the term copper peptides in skin care almost always refers to one particular peptide: copper tripeptide-1, also known as GHK-Cu.3 GHK-Cu consists of two parts: the tripeptide GHK (amino acid sequence glycyl-histidyl-lysine) and copper (Cu).12 The tripeptide GHK without the copper was discovered in 1973 by Dr

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