Peptide Therapy for Hair Growth: Explore Your Options GHK CU Beverly Hills Rejuvenation Center 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, WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents 7% GHK CU ACCELERANT Platinum Skin Care Subcutaneous Injection Sites and Instructions for Safe Self Administration