7% GHK Cu Cosmetic Ingredient Accelerant Skin Biology 15 ml MorNatural 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 What Is GHK Cu? How It Works in Research and Quality Signals GHKCu Copper Peptide Therapy Skin & Healing Regeneration Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare