GHK Cu Copper Peptide Serum Clinical Anti Aging Skin Repair Beverly Hills Luxury Skincare 30ml 120 ml 4 oz GHK CU Royal Blue Serum Aseir Custom GHK Cu Hyaluronic Acid Gel Wells Pharmacy Network 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 peptide(GHK Cu) TFA salt 89030 95 5 FC138108 DUO 25ml by InfiniWell