Cu Peptide Before and After: What to Expect for Skin and Hair GHK Cu Peptide Before and After Results Most people think GHK Cu is just a beauty peptide. But look at this Same person. Same lighting. Real skin change. GHK Cu works by activating repair genes in the body helping with GHK CU Copper Peptides Cream for Face Anti Aging Collagen Booster, GHK CU Peptides Moisturiser Face, Anti Wrinkle Face Cream for Fine Lines & Skin Elasticity, Repairs Damaged Skin, 50g : Amazon.co.za: Beauty