GHK Copper Peptide GHK Cu Tripeptide 1 Experiencing itching & burning from your GHK CU peptide injections? Try these to hacks:, 1. Use a longer syringe to penetrate deeper into the fat cells. , 2. Dilute the copper. Here I show you how to 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 Cooper Peptide: The Complete Skin & Repair Guide (2026)