GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link China Copper Tripeptide 1 GHK Cu 89030 95 5,Buy Copper Tripeptide 1 GHK Cu 89030 95 5 Online china sinoway.com Advanced Spectroscopy for Copper Peptide Research Copper tripeptide 1.xHOAc 89030 95 5 FC180071 Buy GHK Cu Peptide 99%+ Purity GHK Cu for Research 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