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 100mg Peak Haven Copper peptide(GHK Cu) TFA salt 89030 95 5 FC138108 GHK Cu Peptide Serum + SNAP 8 15ml Peplogix GHK Cu Copper Peptide Serum Clinical Anti Aging Skin Repair Beverly Hills Luxury Skincare 30ml 120 ml 4 oz