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, GHK CU NASAL SPRAY CURETONIX GHK Cu + NAC Copper Peptide Nasal Spray , GHK Cu + NAC Copper Peptide Nasal Spray is designed to support cellular regeneration and overall wellness. This nasal spray delivers GHK Cu directly into Ghk Cu Powder Etsy UK GHK Cu Nasal Spray Before and After Results