Buy GHK Cu Cream 0.5% Copper Peptide Pure, Potent, USA Made 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 Duo: Copper Complex Natural Topical HPIHair GHK Cu Skin Serum Peptide Rejuvenation GOAL.MD 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