The Ordinary Multi Peptide + Copper Peptides 30ml Unichem Pharmacy How to Layer Haloxyl and GHK Cu for Tired Eyes The Ordinary Multi Peptide + Copper Peptides 1% for Wrinkles and Skin Elasticity Ulta Beauty 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