Copper peptide GHK-Cu is a naturally occurring copper complex of the tripeptide glycyl-L-histidyl-L-lysine. The tripeptide has strong affinity for copper(II) and was first isolated from human plasma. It can be found also in saliva and urine. Copper Peptide(GHK-Cu) can be used as skin antiaging agents. anti-wrikle Glycyl-L-histidyl-L-lysine is a liver cell growth factor and an asynthetic hepatotrophic agent that stimulates hepatic erythropoietic factor production. Definition ChEBI: A tripeptide composed of glycine, L-histidine and L-lysine residues joined in sequence.Email : salesexecutive1@yeah.net whatsapp: +8618931626169 wickr: lilywang