GHK Cu 50mg Skin & Tissue Repair Research Peptide GHK Cu Repairing Serum 30ml SumaNurica 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 GHK CU 50mg Vial Copper Peptide Pure Bio Labs 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