GHK Cu Peptide: What It Does for Body Composition and Metabolic Health 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 a growing body of peer Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms As a skincare founder who has spent $1.3 million testing products and procedures on her own face, I've tried more peptides than I can count at this point. GHK Cu is the one