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 GHK Cu: The Elegant Copper Peptide for Skin and Scalp Renewal Renew Vitality GHK Cu Topical Cream GHK Cu Copper Peptide 0.5% (topical foam) Shell Medical Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3 Dr. Brenner Labs