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 ★★★★★ 4.1 (131 reviews) Sold : Login>>
GHK-Cu Peptide: What It Does for Body Composition and Metabolic Health US$ 20.06 Min. order: 1 piece ★★★★★ 4.5 (64 reviews) Sold : Login>>
Topical GHK-cu with Hyaluronic acid : r/DIYaesthetics US$ 29.04 Min. order: 1 piece ★★★★★ 5.0 (34 reviews) Sold : Login>>
Injectable Peptides for Anti-Aging? A Dermatologist Explains GHK-Cu US$ 25.88 Min. order: 1 piece ★★★★★ 4.8 (134 reviews) Sold : Login>>