Defy GHK Cu (glycyl L histidyl L lysine) is a naturally occurring copper binding peptide found in human plasma. As levels decline with age, so may its support of the biological processes involved in collagen production, skin Struggling with hair thinning or shedding? Meet GHK Cu, the topical peptide everyone is talking about and NO, it's not an injection! This powerful serum helps: Reduce shedding Division Twenty Shop GHK CU Topical Serum Kit 50ml Azur Skin The Ordinary Multi Peptide + Copper Peptides 30ml Unichem Pharmacy GHK Copper Peptide GHK Cu Tripeptide 1