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 and Reproductive Health: Mechanisms, Fertility Benefits Glutathione reduced form made of three amino acids repavital.de What is the safe topical dosing, duration, and contraindications for the copperbinding peptide GHKCu for wound healing or antiaging? Glutathion rductase Wikipdia