GHK CU Crescent Chems Research GHK Cu (glycyl L histidyl L lysine) is a naturally occurring copper binding peptide found in human plasma. As levels decline with age, so may its support of the biological processes involved in collagen production, skin repair, and GHK Cu: The Peptide That Supports Healthy Aging GHK Cu (copper peptide) is naturally occurring in the body and plays a role in supporting skin health, collagen production, and tissue repair. As 3 Ml 5 Ml 10 Ml Ghk Cu Vial Dng Cht Peptide ng Xanh Chng Lo Ha Cp m Sa Cha cho Chm Sc Da