GHK Cu Peptide for Skin & Hair Facial Serum & Scalp Solution 7% GHK Cu Cosmetic Ingredient Accelerant Skin Biology 15 ml Struggling with hair thinning or shedding? Meet GHK Cu, the topical peptide everyone is talking about and NO, it's not an injection! This powerful serum helps: Reduce shedding 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