Introduction GHK Cu is a copper peptide complex formed from the tripeptide glycyl L histidyl L lysine bound to copper. This compound has garnered significant attention in both laboratory and formulation research due to its critical role GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration GHK Cu (Raw) 1g Ion Peptide Copper Peptide (GHK Cu) Supplier Cosmetic Ingredient for Formulators Creative Peptides