GHK Cu (Copper Peptide) Lyophilized LeadWest Medical Unlocking the Secrets of GHK Cu: The Revolutionary Peptide for Youthfu Time for a little GHK CU update for the people who are interested. Its day 9. I took a little break on day 5 just so my body didnt get too used to the peptides and Ill just keep going in this 5 GHK Cu Peptide: Turn Back the Clock Naturally Calibrate Hydration Copper peptides explained what are the differences between copper peptides and GHK CU peptides? What they actually do for the skin in terms of repair and collagen, and what you can and cant mix