Leuphasyl Peptide and Wrinkles Biotech Peptides 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 I've tested more topical peptides than most dermatologists have recommended and I have strong opinions about all of them. Peptides are the communication system your skin runs on and around 40, that Glow Peptide Protocol GHK Cu, BPC 157, TB 500 Neurogan Health