GHK Cu Copper Peptide Cream (Prescription) UluRx Defy 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 Compounded GHK Cu Topical Cream Restorative Compounding Pharmacy + Wellness GHK Cu Peptides Benefits for Anti Aging Skin Rejuvenation How to Use With Micro Infusion I'm Fabulous Cosmetics