CAT and cancer: Serum antioxidant enzymes levels including catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPx), and malondialdehyde (MDA) concentrations in blood are lower in cancer patients and are associated with cancer prognosis (48) and several studies proposed prescription of antioxidants rich products to decreasing the treatment adverse effects or slowing the cancer progress (49–51).