CAT and obesity due to melanocortin 4 receptor deficiency: It is worth noting that people with obesity are more susceptible to oxidative damage due to depleted resources of antioxidants, such as superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase (CAT), as well as vitamins A, E, C, and β-carotene compared with people with normal body weight [153].