Advanced Copper Peptide Serum 300mg High Purity (99.6%) GHK Cu Mul Sapnne Naturals GHK Cu Peptide Therapy Topical Cream BHive Management GHK Cu 50mg 10mL Vial: Automatic Refills Celia Health 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