GHK Cu NextGenPeps 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 The GHK Cu delays aging in Caenorhabditis elegans via coordinated regulation of mitochondrial function and activation of DAF 16 SKN 1 pathways Biogerontology Springer Nature Link GHK CU Crepey Skin Escape Platinum Skin Care