COPPER TRIPEPTIDE GHK AGE REGRESSION.COM 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 Copper tripeptide (GHK Cu; Copper Glycyl histidine tripeptide) CAS 89030 95 5 AbMole BioScience Copper tripeptide Price GHK Cu: The Elegant Copper Peptide for Skin and Scalp Renewal Renew Vitality Ghk Cu Copper Peptide: Uncover Its Full Potential