Copper Peptide (GHK Cu) Supplier Cosmetic Ingredient for Formulators Creative Peptides Theoretical study of copper binding to GHK peptide ScienceDirect Copper peptide GHK Cu Tripeptide Proteasome Bortezomib, angle, white png PNGEgg 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 GHK Cu Peptide 100mg For Copper Binding Research