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, Peptide Therapy for Pain Management and Healing Core Medical & Wellness Subcutaneous Injection Sites and Instructions for Safe Self Administration Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. Westend Medical Supply GHK Cu Injection Pen Australia Subcutaneous Copper Peptide Inject+