One of my patients has shared this picture with me as she felt it was odd that this peptide had this very vivid blue colour, while her other peptides had a clear GHK Cu Peptide: What It Does for Body Composition and Metabolic Health Should Bodybuilders Take GHK Cu? Neurogan Health GHK CU 50mg Peptify GHK Cu: The Glow Peptide Supporting Skin, Hair, and more Molecular crystal structure of the tripeptide GHK Cu. In solution, Download Scientific Diagram