Copper Peptide GHK-Cu is a naturally occurring copper complex of the tripeptide glycyl-L-histidyl-L-lysine. This tripeptide has a strong affinity for copper(II) and was originally isolated from human plasma. It can also be found in saliva and urine.Overview[edit]Several copper(II)-peptide complexes

Blue copper peptide is a small molecule protein and is the earliest discovered peptide. To put it more bluntly, this thing is a combination of a polypeptide (tripeptide-1) and a copper ion.

Copper peptide, also called Blue copper peptide,copper peptide, tripeptide-1 copper, abbreviated as GHK-Cu in English, has a rare structural sequence glycyl-L-histidyl-L-lysine-Cu (II).