GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? Copper Peptides and Vitamin C Can You Use Copper Peptides With Vitamin C? 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 If you're using GHK Cu and it stings a little (which is common) this one's for you In this reel I'm sharing the small tweaks that have helped me make peptide injections Revitalize Your Skin: The Benefits of Copper Peptide for Youthful Glow