GHK Cu Peptide: What It Does for Body Composition and Metabolic Health WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents GHK CU is one of the most underrated anti aging peptides and it's been around longer than almost everything else. In my experience, GHK CU isn't just a cosmetic peptide. It improves collagen remodeling, reduces 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,