Ghk cu Peptide Face Serum NEW Cobalt Blue Bottle 2 Oz Etsy Four reasons this serum belongs in your routine. GHK Cu Peptides that firm and support collagen renewal. Barrier support to keep your skin healthy and resilient. No injection. No needles. No clinic visit. Copper Peptides Serum for Face 2% Copper Peptide with 4% Epidermal Growth Factor (EGF Serum) Niacinamide Ceramides Squalane & Hyaluronic Acid Multi GHK CU Copper Peptide, Hair & Scalp Serum, 2 oz (60 ml)