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$ 24.24 Min. order: 1 piece ★★★★★ 4.6 (115 reviews) Sold : Login>>
One of my patients has shared this picture with me as she felt it was odd that this peptide had this very vivid blue colour, while her other peptides had a clear US$ 22.10 Min. order: 1 piece ★★★★★ 4.8 (191 reviews) Sold : Login>>
BLUE 🔹Copper Peptide GHK-CU Serum with Hyaluronic Acid Anti Wrinkle Assortment US$ 29.11 Min. order: 1 piece ★★★★★ 5.0 (268 reviews) Sold : Login>>
10GS: HUMAN GLUTATHIONE S-TRANSFERASE P1-1, COMPLEX WITH TER117 US$ 26.98 Min. order: 1 piece ★★★★★ 4.6 (152 reviews) Sold : Login>>