PCL GHK CU 75mg PekCura Labs Copper Peptides Serum for Face 2% Copper Peptide with 4% Epidermal Growth Factor (EGF Serum) Niacinamide Ceramides Squalane & Hyaluronic Acid Multi Copper Tripeptide (GHK Cu) for Advanced Skincare & Haircare Formulatio Skin Brightening Moisturizing Snap 8 Ghk Cu Serum Skin Care Face Serum Face Serum and Skin Care Face Serum price Made in China.com 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 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