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$ 24.24 Min. order: 1 piece ★★★★★ 4.2 (297 reviews) Sold : Login>>
One of my patients has shared this picture with me as she felt it was odd that this peptide had this very vivid blue colour, while her other peptides had a clear US$ 22.10 Min. order: 1 piece ★★★★★ 4.6 (32 reviews) Sold : Login>>
Human Glutathione Peroxidase 4 (GPX4) ELISA Kit (HUDL01248) US$ 23.60 Min. order: 1 piece ★★★★★ 4.2 (279 reviews) Sold : Login>>
Best Selling Skin Care Anti-Aging Anti Wrinkle Repairing Firming Ghk-Cu Blue Copper Peptide Serum US$ 25.66 Min. order: 1 piece ★★★★★ 4.4 (127 reviews) Sold : Login>>
Blue Copper Peptide (GHK-Cu) Guide: Anti-Aging Science, Formulation & OEM US$ 20.57 Min. order: 1 piece ★★★★★ 4.8 (87 reviews) Sold : Login>>