Biossance Squalane + Copper Peptide Rapid Plumping Serum GHK Cu + 15% Palmitoyl Pentapeptide 4 + 2% Hyaluronic Serum, Estheticians Love GHK Cu Copper Peptide Face Tonic (30 mL) Reduces Appearance of Fine Lines Supports Skin Firmness 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