GHK Cu Peptide (50mg) Advanced Skin Rejuvenation & Healing Support Helloskin GHK Cu 1% Triple Peptide Regenerative Serum The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, 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