Hyaluronic Acid 2% + GHK Cu (Serum) G Lab Peptides What Is GHK Cu? The Trending Copper Peptide Everyone Is Talking About Parlor Beauty 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 Peptide GHK CU Cream Concierge MD Copper Peptides Elmhurst IL Chicago Accelerated Aesthetics USA Copper Peptide GHK Cu Powder, DIY Blue Copper for Making the Best Face Cream