Neurogan Health Copper Peptide GHK CU , 120 mcg, 60 Tablets, 0.52 oz (15 g) eBay Young Goose Blue Peptide Spray Copper Peptide Body Wash Anti Aging, Skin Firming & Hydration Pept Peptide Labz 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
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