Unlocking the Secrets of GHK Cu: The Revolutionary Peptide for Youthfu Same GHK Cu. Better way. Same GHK Cu copper peptide complex. Completely different experience. If you've been eyeing the pen, put it down. We made something better, and your skin barrier will thank you GHK Copper Peptide GHK Cu Tripeptide 1 GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has