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 Emerging insights in senescence: pathways from preclinical models to therapeutic innovations npj Aging GHK Cu Copper Peptide Skin & Healing Beverly Hills PSA] Albeit rare Copper peptide "uglies" are real and scary. Case report and looking for advices : r SkincareAddiction