GHK Cu Copper Peptide: The Ultimate Peptide For Longevity This is my third cycle on GHK Cu., My hair is growing. My nails are strong. My skin has improved. , And now Im focusing on those acne scars from my younger days., And honestly? Theyre starting to go Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms