What Are GHK Cu Peptides for Skin and Hair Health? 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 Peptides Serum TryDeloura Copper Peptide 10% GHK CU, 5% AHK CU Peptides Hair Growth Treatment Serum eBay Copper Peptides Before and After: Visible Skin Improvements Explained Hubmed