NL GHK Cu protection against heart, eye, and brain diseases Synthagen PL GHK CU GHK Cu Peptide Therapy Connecticut Skin Rejuvenation Benefits GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes GHK Cu is a powerful copper peptide that supports collagen production, skin and hair health, and tissue repair. It may help reduce fine lines, improve elasticity, and promote faster healing. Want to learn