GHK Cu 50mg High Purity Research Peptide High Purity 99% GHK Cu Copper Peptide Powder CAS 49557 75 7 Supplier Deshangchemical chemechemi chemECHEMI GHK CU 100MG Alpha Omega Peptide 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 Cu ion at the center
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