GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy GHK Cu update! Stinging has subsided, still leaving a little bit of a welt but much better than before! #peppers #ghkcu #copper GHK CU, Why this audio? Because injecting feels like a constant wasp sting so it takes me about 15 seconds to pin .2 mL. I dread this shot every night for that reason. Also, it leaves me bruised, so I 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 Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum