GHK Cu Copper Peptide for Skin & Healing Valeo Health Copper Peptides for Skin: What GHK Cu Does and How It Compares to Retinol GHK CU Copper Peptide, Face Cream, 2 oz (60 ml) GHK CU Peptides Rock Let's talk about one of my FAVORITE glow peptides: GHK Cu GHK Cu (Copper Peptide) is a naturally occurring peptide in your body that plays a HUGE role in healing, repair, and overall Copper Peptide (GHK Cu) 2% Recovery Serum