GHK Cu Peptide: What It Does for Body Composition and Metabolic Health 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 Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health GHK CU for Sale Tripeptide 1 3rd Party Tested US Made GHK Cu Peptide: Benefits for Tissue Repair, Healing, and Recovery Revolution Health & Wellness