Copper Peptide GHK CU 12% Serum for Face Anti Wrinkle Increase Collagen 1oz 30ml Anti Aging for Skin Good skin starts with the right ingredients. We made the GHK Cu Peptide Serum for people who want real results without the clinical experience. Copper peptides, hyaluronic acid, niacinamide and more, in one Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Jumbo Size Amazon.com: Neurogan GHK Cu (Copper Peptide) Neck & Face Serum 1,200mcg (1 oz bottle) : Beauty & Personal Care