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 Duo: Copper Complex Natural Topical HPIHair Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. 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 WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents GHK Cu Peptide The benefits, side effects, and more [2026]