Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy 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 Peptide: Hair Regrowth for Thinning & Alopecia