GHK CU Copper Peptide, Face Cream, 2 oz (60 ml) HealthyDerm Copper Peptides GHK Cu Beef Tallow for Skin: Blue Balm with Methylene Blue, Manuka Honey & Vitamin E Natural Face and Body Moisturizer for Mature, Dry & Sensitive Skin 2OZ Tighten Dermatology Line Olympia Pharmaceuticals Your skin holds a protein called copper peptide and it naturally declines with age. GHK Cu, the star of our RenewMe program, works by replenishing that signal so your body remembers how GHK Cu Peptide for Skin & Hair Facial Serum & Scalp Solution