Ultimate Guide to GHK Cu for Dogs: Benefits, Uses, Safety, & Applications iHeartDogs.com If your GHK Cu or MOTS C injection leaves welts and burns like a hornet, it's usually not the peptide it's the technique. A few small tweaks can turn a sting into almost Injection Site Pain Genoskin 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 How to Mitigate GHKCU Burn and Stinging Effectively