GHK Cu, commonly known as copper peptides, are found naturally within the human body where they play a vital role in skin repair and maintenance. Copper peptides support optimal skin function by helping GHK Cu: The Elegant Copper Peptide for Skin and Scalp Renewal Renew Vitality GHK Cu Peptide: Turn Back the Clock Naturally Calibrate Hydration Copper Peptide Regenerating Serum for Glowing Skin and Hair GHK Copper Peptide GHK Cu Tripeptide 1