GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. Westend Medical Supply GHK Cu: The Glow Peptide Supporting Skin, Hair, and more 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