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, A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend What is the safe topical dosing, duration, and contraindications for the copperbinding peptide GHKCu for wound healing or antiaging? GHK Cu Peptide Copper Peptides for Hair YouTube