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 SKIN WHITENING GLUTATHIONE 2000mg Per Serve Brightening Lightening Pills 120 Cap eBay Reduced Glutathione Supplement, 1000mg Pure Glutathione with Alpha Lipoic Acid & Milk Thistle for Skin, Liver & Immune Support, Nature's Craft, 120ct : Target Young Goose Blue Peptide Spray GHK Cu 50mg Lyophilized Peptide PatriotChems
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