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 Alibaba.com: GHK Cu Peptides Cosmetic Grade, Fast Delivery, Skin Care Powder Serum : Connect with verified suppliers offering CE, BV, ISO certified products for bulk orders. Glutathione Tablets for Skin Glow & Brightening Chicnutrix Glow Glutathione for the skin Paula's Choice Close up of Blue Copper Peptides GHK Cu in Pipette. Beauty serum for anti aging beauty routine Stock Photo Alamy
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glutathione benefits and side effects 1% GHK-CU solution: is this applied directly on skin or diluted further? : r/DIYaesthetics