Copper peptides GHK-Cu, 60 mg - solution for preparation US$ 22.44 Min. order: 1 piece ★★★★★ 4.2 (63 reviews) Sold : Login>>
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$ 29.96 Min. order: 1 piece ★★★★★ 4.5 (166 reviews) Sold : Login>>