GHK Cu Copper Peptide: Evidence, Mechanisms & COA Guide Nootropix Computational study of copper binding to DAHK peptide ScienceDirect Your copper peptide product should be this exact blue. If it isn't, you already have your answer. GHK Cu is blue because of coordination chemistry, not dye. The Cu ion at the center Influence of Coordination Geometry upon Copper(II I) Redox Potentials. Physical Parameters for Twelve Copper Tripodal Ligand Complexes Inorganic Chemistry Copper Tripeptide (GHK Cu) for Advanced Skincare & Haircare Formulatio GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes