What is the safe topical dosing, duration, and contraindications for the copperbinding peptide GHKCu for wound healing or antiaging? GHKCu Copper Peptide Therapy Skin & Healing Regeneration 2026 FDA Peptide Reclassification Purefico Medspa and Therapy 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 50mg Vial Copper Peptide Pure Bio Labs