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RONKIE GHK Cu Peptide Cream for Face: Blue Beef Tallow Moisturizer with Copper Peptides Methylene Blue Gentle and Safe for Dry Sensitive Mature Skin 2oz : Beauty & Personal Care GHK Cu Copper Peptide Serum Private Label Skin Repair NO Label Buy GHK Cu 100mg Peptide COA Verified UK Blue Copper Peptide Lyophilized Powder GHK CU Skin Repair Firming Hydration Brightening Essence Improve Elasticity SkinCa AliExpress 66 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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