GHK Cu Youthful Skin, Healthy Cells, Vibrant You. GHK Cu 50mg Particle Peptides Peptides are the hottest word in wellness right now, so naturally I had to dive in!, The peptide stack I am trialing is GHK CU (hair, skin & nails) and Glutathione (neutralizes free radicals, reduces GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B A year ago I started working with a copper peptide called GHK Cu. Topically every night. And under my doctor's care, I went deeper than topicals with a low dose. The difference in GHK Cu Peptide Dosing PeptidesPower