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 Your skin holds a protein called copper peptide and it naturally declines with age. GHK Cu, the star of our RenewMe program, works by replenishing that signal so your body remembers how Ultimate Anti Aging Tallow Balm with GHK Cu Copper, Acetyl Hexapeptide WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents