GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes GHK Cu Copper Peptide Regeneration, Skin Renewal & Anti Age Peptide Spotlight: GHK Cu (Copper Peptide) A naturally occurring tripeptide found in human blood. Here's what the preclinical research shows. Swipe for Research Simplified and full study citations. Full studies: http: pmc.ncbi.nlm.nih.gov articles Meet the peptide your skin has been waiting for Studies show that GHK Cu is known for stimulating collagen, improving skin quality, and supporting true cellular regeneration working beneath the surface