GHK Cu Facial Serum Empower Pharmacy GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? Am+Pm 5% B5+GHK Cu Hydrating Serum 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 GHK Cu Copper Peptide 0.5% (topical foam) Copper Peptides for Oily, Dry & Sensitive Skin Glimmer Goddess