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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$ 28.51 Min. order: 1 piece ★★★★★ 4.6 (21 reviews) Sold : Login>>
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GHK-Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes US$ 26.25 Min. order: 1 piece ★★★★★ 4.3 (106 reviews) Sold : Login>>
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Molecular structure of the tripeptide GHK-Cu. In solution lysine US$ 22.61 Min. order: 1 piece ★★★★★ 4.0 (100 reviews) Sold : Login>>