NL GHK Cu (TETRAPEPTIDE + CU) Synthagen Synthagen PL Close up of Blue Copper Peptides GHK Cu in Pipette. Beauty serum for anti aging beauty routine Stock Photo Alamy Clip: The Purge: Anarchy Most people don't know GHK Cu by name. Their face does. It's the peptide your body uses to signal collagen production, repair tissue, and keep skin behaving younger. Production drops sharply with 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 GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B