The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, GLOW (BPC 157 GHK CU KPV TB500) Injections Team Wellcore Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK