GHK Cu Peptide for Regenerative Signaling and Tissue Repair Noelle Diamond, RDN, MA posted on the topic LinkedIn Copper Coordination Compounds as Biologically Active Agents Electrophoretic deposition of GHK Cu loaded MSN chitosan coatings with pH responsive release of copper and its bioactivity ScienceDirect Advanced Spectroscopy for Copper Peptide 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