Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Copper peptide questions we get asked all the time How often should you use it? Do you need to avoid the sun? If you're new, start once daily (evenings are great), Hair Growth Serum Intense with Copper Peptide GHK Cu Squalane + Copper Peptide (GHK Cu) Rapid Plumping 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 7% GHK CU ACCELERANT