GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes GHK Cu 100MG Lumen Peptides GHK Cu (Glycyl L Histidyl L Lysine Copper) is a naturally occurring copper peptide that is gaining attention in hair care for its regenerative properties. It is a non hormonal option that can help improve the cosmetic appearance of How GHK Peptide Works Signaling GHK acts as a switch for skin repair: Interacts with adenosine receptors reduces inflammation Activates MAPK ERK, PI3K Akt, TGF pathways Stimulates fibroblasts & keratinocytes boosts collagen, elastin