GHK CU: 100mg Supernova Peptides 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 PSA] Albeit rare Copper peptide "uglies" are real and scary. Case report and looking for advices : r SkincareAddiction GHK Cu Copper Peptide Neck & Face Serum STOP the GHK Cu itch!, The secret to a painless GHK Cu injection? The 15 Minute Rule. , Injecting cold, acidic peptides causes mechanical and chemical stress on your cells. , To lower the sting:,