GHK Cu Topical Serum Eden and Eve Skin Care 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 What Is Peptide Therapy and Is It Safe? Private Label Copper Peptide Serum Anti Wrinkle Hyaluronic Acid for Face & Neck 30ml Nourishing Skin Care Solution Glacier Glow GHK Cu Collection GHK Cu Peptide for Skin & Hair Facial Serum & Scalp Solution