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$ 25.44 Min. order: 1 piece ★★★★★ 4.6 (194 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$ 26.58 Min. order: 1 piece ★★★★★ 4.0 (254 reviews) Sold : Login>>
Injectable Peptides for Anti-Aging? A Dermatologist Explains GHK-Cu US$ 25.88 Min. order: 1 piece ★★★★★ 4.8 (155 reviews) Sold : Login>>
GHK Cu Peptide Serum – Copper Peptide Serum for Tightening, Collagen Boosting & Hydrating – Topical GHK-Cu with Hyaluronic Acid US$ 27.68 Min. order: 1 piece ★★★★★ 4.4 (269 reviews) Sold : Login>>
99% Pure Copper Peptides (ghk-cu) | Great for DIY - 1 Gram US$ 24.74 Min. order: 1 piece ★★★★★ 5.0 (219 reviews) Sold : Login>>