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, Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms Side Effects of Taking Experimental Peptides Explained Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Expression and Purification of Recombinant GHK Tripeptides Are Able to Protect against Acute Cardiotoxicity from Exposure to Waterborne Copper in Zebrafish