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GHK Cu Blue Copper Peptide Face Cream 4% 2400mg Night Moisturizer Anti Aging Copper Peptide GHK Cu Beef Tallow: Grass Fed Blue Balm for Mature Skin Face and Body Moisturizer with Methylene Blue, Manuka Honey & Vitamin E Natural Skincare for Dry & Sensitive Buy GHK Cu 50mg & 100mg Copper Tripeptide Koi Peptides 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 GHK Cu Blue Copper peptide for anti aging care @COSRX US @COSRX Official #cosrx #summervibes #summerwins #antiagingskincareroutine #ghkcu

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