GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) Amazon.com: Neurogan GHK Cu (Copper Peptide) Neck & Face Serum 1,200mcg (1 oz bottle) : Beauty & Personal Care This advanced peptide serum, powered by GHK Cu (Copper Tripeptide 1), is designed to visibly rejuvenate and refine your skin. Formulated with a bioactive brightening peptide complex, it helps improve Copper Peptides Serum for Face 2% Copper Peptide with 4% Epidermal Growth Factor (EGF Serum) Niacinamide Ceramides Squalane & Hyaluronic Acid Multi