Mitigating GHK Cu Injection Pain: Tips and Tricks Gabriel Alizaidy, MD, MS posted on the topic LinkedIn GHKCu protects against CSinduced muscle dysfunction in mice. (A) Download Scientific Diagram 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 Why does Glycyl Histidyl Lysine Copper (GHK Cu) cause pain or discomfort?