Oxidative stress-related biomarkers, including reactive nitrate (NO2–), malondialdehyde (MDA), and ROS, are markedly increased in AD [11,13], while antioxidants, such as glutathione peroxide (GPx), catalase (CAT), superoxide dismutase (SOD), and glutathione (GSH), may help control these effects [14,15]. This evidence concerns the gene CAT and Alzheimer disease.