Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms 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 Troche Strive Pharmacy Glow Peptide Injection: Revolutionizing Skin Rejuvenation Hubmed WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents