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 (56 reviews) Sold : Login>>
SKINHI™ BLUE01 Copper Peptide GHK-CU 1.4% All Over Body Care Size 50ml US$ 22.66 Min. order: 1 piece ★★★★★ 4.2 (210 reviews) Sold : Login>>
Copper Peptides Serum for Face 2% Copper Peptide with 4% Epidermal Growth Factor (EGF Serum) Niacinamide Ceramides Squalane & Hyaluronic Acid Multi US$ 26.32 Min. order: 1 piece ★★★★★ 4.0 (209 reviews) Sold : Login>>
GHK-Cu Peptide Benefits (And a Few Risks) Explained US$ 20.73 Min. order: 1 piece ★★★★★ 4.7 (258 reviews) Sold : Login>>
China Cheapest Price Cosmetic Grade Blue Peptide Powder Copper Peptide / Ghk -Cu Powder factory and manufacturers US$ 26.20 Min. order: 1 piece ★★★★★ 4.0 (197 reviews) Sold : Login>>