Best in 7 days L-Glutathione Reduced - Super Antioxidant - 320mg Premium Glutathione US$ 21.12 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$ 25.18 Min. order: 1 piece ★★★★★ 4.2 (62 reviews) Sold : Login>>
Amazon.com: DEAL SUPPLEMENT NAC Supplement (N-Acetyl Cysteine) 1,000mg Per Serving with Reduced Glutathione, 240 Capsules – Antioxidant Support for Immune Health, Lung, & Liver Function : Health & Household US$ 26.68 Min. order: 1 piece ★★★★★ 4.5 (167 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 ★★★★★ 4.7 (167 reviews) Sold : Login>>
SKINHI™ BLUE01 Copper Peptide GHK-CU 1.4% All Over Body Care Size 50ml US$ 22.66 Min. order: 1 piece ★★★★★ 4.5 (239 reviews) Sold : Login>>
Copper Peptide Body Wash | Anti-Aging, Skin Firming & Hydration US$ 28.06 Min. order: 1 piece ★★★★★ 4.1 (79 reviews) Sold : Login>>