GHK Cu Copper Peptide Skin & Healing Beverly Hills 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 Peptide Injection Treatments Benefits & Uses Hubmed Peptide Injection Site Reactions: What's Normal and Prevention Tips Why I Use GHK Cu: The Copper Peptide That Talks to Your Cells