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 Crepey Skin Escape Platinum Skin Care DUO 25ml by InfiniWell Young Goose Blue Peptide Spray ZQ II GHK Cu Copper Peptide Serum Manufacturer Anti Aging & Skin Repair
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