GHKCu Copper Peptide Therapy Skin & Healing Regeneration GHK Cu Youthful Skin, Healthy Cells, Vibrant You. GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes Many people are being told to inject peptides like BPC 157, GHK Cu, or TB500 right over the area of pain, thinking it will deliver the peptide directly into the injured tissue. Thats simply not true. Can subcutaneous injection of GHKCu (copperbinding peptide) increase the risk of cancer?