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, BPC 157, TB 500, GHK Cu 30mg (Glow Blend) Peptide Origin Compounds Copper GHK + Facial Serum Ghk Cu Copper Peptide Serum Etsy GHK Cu Copper Peptide Serum Private Label Skin Repair GLOW Blend UK TB 500, BPC 157 & GHK Cu Research Blend