What is the safe topical dosing, duration, and contraindications for the copperbinding peptide GHKCu for wound healing or antiaging? Glow Peptide Protocol GHK Cu, BPC 157, TB 500 Neurogan Health Understanding Topical GHK Cu Peptide Benefits for Skin Rejuvenation in Maryland Preston's Pharmacy 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