In an adult with pattern hair loss or diffuse thinning and no known copper allergy, what is the recommended firstline topical peptide (copperpeptide, GHKCu) regimen? GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Peptide for Hair Growth: Evidence, Types, How to Pick Rumbie 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 Ghk Cu Shampoo Copper Peptide Hair Growth Best Peptide for Hair Growth Copper Peptide Shampoo