12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK Optimal results are best achieved under the guidance of a professional healthcare provider. 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 GHK Cu Youthful Skin, Healthy Cells, Vibrant You. GHK Cu Copper Peptide Skin & Healing Beverly Hills Eye C.A.R.E.