Can subcutaneous injection of GHKCu (copperbinding peptide) increase the risk of cancer? Peptide Therapy for Pain Management and Healing Core Medical & Wellness GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not