Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Switch Nutrition Hair and Skin Supplement with GHK Cu Peptide Collagen Supplements.co.nz GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper