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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$ 22.54 Min. order: 1 piece ★★★★★ 4.7 (97 reviews) Sold : Login>>
Our Science – Nacuity Pharmaceuticals US$ 29.81 Min. order: 1 piece ★★★★★ 4.4 (295 reviews) Sold : Login>>
Copper Peptide Serum for Dull & Mature Skin US$ 23.39 Min. order: 1 piece ★★★★★ 4.8 (17 reviews) Sold : Login>>
The mechanism of action of N-acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species US$ 21.39 Min. order: 1 piece ★★★★★ 4.2 (75 reviews) Sold : Login>>
50mg GHK Cu Vial Blue Copper Peptide Face Serum Age-Aging Moisturizing Repairing for Skin Care Serum Facial Care Kit d US$ 27.44 Min. order: 1 piece ★★★★★ 4.3 (159 reviews) Sold : Login>>
Blue Copper Peptide Ghk Cu 99% Care Ghk-Cu 50mg 100mg vials Cosmetic Ingredient US$ 26.38 Min. order: 1 piece ★★★★★ 4.5 (103 reviews) Sold : Login>>