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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 Cu²⁺ ion at the center US$ 20.81 Min. order: 1 piece ★★★★★ 4.7 (267 reviews) Sold : Login>>
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Buy Blue Copper Peptide Powder Ghk-cu Copper Peptide Cas 130120-57-9 For Anti-allergic Skin Repair Series Pharmaceutical Grade from Dongguan Chenguang Technology Co., Ltd US$ 21.65 Min. order: 1 piece ★★★★★ 4.6 (220 reviews) Sold : Login>>