GHK Cu Peptide for Regenerative Signaling and Tissue Repair Noelle Diamond, RDN, MA posted on the topic LinkedIn GHK Cu C28H48CuN12O8 CID 133697840 PubChem Buy GHK Cu Exceptional 99%+ Purity Third Party COA Included Electrophoretic deposition of GHK Cu loaded MSN chitosan coatings with pH responsive release of copper and its bioactivity ScienceDirect 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 Advanced Spectroscopy for Copper Peptide Research