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 Product Question] Most effective way to deliver GHK Cu (Copper Tripeptide 1) through skin? : r SkincareAddiction GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B 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 Subcutaneous Injection Sites and Instructions for Safe Self Administration