Unlocking the Secrets of GHK Cu: The Revolutionary Peptide for Youthfu 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 Two Ingredients. Real Hair Transformations. How Neurogan Health's GHK Cu Serum Is Changing What Customers Expect From Hair Care Morningstar Transform Your Skin: GHK CU Before & After Results