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$ 20.81 Min. order: 1 piece ★★★★★ 4.4 (110 reviews) Sold : Login>>
99% Pure Copper Peptides (ghk-cu) | Great for DIY - 1 Gram US$ 21.56 Min. order: 1 piece ★★★★★ 4.0 (284 reviews) Sold : Login>>
Cuboctahedral copper cluster promotes main group coordination to new high | Research US$ 24.09 Min. order: 1 piece ★★★★★ 4.3 (236 reviews) Sold : Login>>
GHK-CU for Sale | Tripeptide-1 | 3rd-Party Tested US$ 21.91 Min. order: 1 piece ★★★★★ 4.8 (192 reviews) Sold : Login>>