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$ 28.17 Min. order: 1 piece ★★★★★ 4.3 (296 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 ★★★★★ 4.2 (41 reviews) Sold : Login>>
GHK-Cu Copper Peptide – Anti-Aging Skincare Tri-Peptide – Bulk Naturals US$ 27.70 Min. order: 1 piece ★★★★★ 4.6 (209 reviews) Sold : Login>>
Close up of Blue Copper Peptides GHK-Cu in Pipette. Beauty serum for anti aging beauty routine Stock Photo US$ 26.16 Min. order: 1 piece ★★★★★ 4.7 (279 reviews) Sold : Login>>
99% Pure Copper Peptides (ghk-cu) | Great for DIY - 1 Gram US$ 20.30 Min. order: 1 piece ★★★★★ 4.3 (218 reviews) Sold : Login>>