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 ★★★★★ 4.8 (35 reviews) Sold : Login>>
Buy GHK-Cu | Exceptional 99%+ Purity US$ 25.65 Min. order: 1 piece ★★★★★ 4.2 (200 reviews) Sold : Login>>
GHK-Cu Peptide: Beginner's Guide to Potential Benefits US$ 29.79 Min. order: 1 piece ★★★★★ 4.7 (122 reviews) Sold : Login>>