Expression of Glycosaminoglycans and Small Proteoglycans in Wounds: Modulation by the TripeptideCopper Complex Glycyl L Histidyl L Lysine Cu2+ ScienceDirect Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes GHK Cu for Skin & Wound Healing: Current Evidence Meeting Point Health