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 Avantic Beauty GHK Cu Peptide Serum for Anti Aging, Guyana Ubuy Revitalize Your Skin: The Benefits of Copper Peptide for Youthful Glow