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, Subcutaneous Injection: What It Is and How to Give One Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B