A lot of people asked how I use GHK Cu (copper peptide) with a pen device, so here's a quick tutorial showing exactly how I do it. In this video I show how DSIP 5MG Research Grade Peptide Ultima Labs Australia GHK Peptide Injection and GHK Cu Benefits, Uses ,safety How to Use Copper Peptides Guide Neurogan Health WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents