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 How to Use GHK Cu Repairing Serum SumaNurica GHK Cu Peptide Benefits for Skin and Hair LIVV Natural Amazon.com: GHK Cu Copper Peptide Supplement, 120mcg High Purity Supplement for Skin & Hair, Enteric Coated for Maximum Absorption, Vegan & Gluten Free (60 Count) : Health & Household GHK CU Crepey Skin Escape Platinum Skin Care
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