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 GHK Cu update! Stinging has subsided, still leaving a little bit of a welt but much better than before! #peppers #ghkcu #copper A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend