GHK Cu Copper Peptide Serum with Hyaluronic Acid Anti Aging Facial Serum, Deep Moisturizing & Copper Peptide Firming Serum: Elasticity & Age Defying Dermaesthetics Beverly Hills GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has Copper Peptides Serum for Face 2% GHK CU & 4% EGF