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 Intra Nasal Spray 50 mg 0.34 oz. GHK Cu Dosage Calculator and Chart A Z Guide Starting GHK Cu peptide that will support collagen production, hair growth , and overall skin rejuvenation. #peptide #ghk cu #wellness #epcw #suhesthetics