ghk cu HURTS, how to prevent that??? : r PeptideForum 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 Injectable GHK Cu: Beginner's Guide to Copper Peptide Ghk Cu Painful TikTok Many people are being told to inject peptides like BPC 157, GHK Cu, or TB500 right over the area of pain, thinking it will deliver the peptide directly into the injured tissue. Thats simply not true.