Copper Peptide Serum for Dull & Mature Skin US$ 23.39 Min. order: 1 piece ★★★★★ 5.0 (78 reviews) Sold : Login>>
GHK-Cu Copper Peptide – Anti-Aging Skincare Tri-Peptide – Bulk Naturals US$ 27.70 Min. order: 1 piece ★★★★★ 4.3 (269 reviews) Sold : Login>>
BLUE PEPTIDE SPRAY – Young Goose US$ 28.24 Min. order: 1 piece ★★★★★ 4.9 (147 reviews) Sold : Login>>
A GHK-Cu face serum appears blue because the active ingredient, “GHK-Cu” (copper peptide), is naturally a blue-colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue US$ 25.85 Min. order: 1 piece ★★★★★ 5.0 (127 reviews) Sold : Login>>
A GHK-Cu face serum appears blue because the active ingredient, “GHK-Cu” (copper peptide), is naturally a blue-colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue US$ 29.23 Min. order: 1 piece ★★★★★ 4.2 (78 reviews) Sold : Login>>
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 ★★★★★ 4.8 (78 reviews) Sold : Login>>