What is GHK Cu and Why is Everyone Talking About It? GHK Cu (Copper Peptide) is a powerful, naturally occurring compound in the body that plays a key role in skin health GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes peptide dosage explained Archives Copper Peptides Serum for Face 2% GHK CU & 4% EGF Seraphime GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B