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 Why do glow peptides burn or sting after injection? If you're using GHK Cu, BPC 157, or TB 500 for skin health, hair, or tissue repair, this is a common question and usually not GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B