Interestingly, in morbidly obese patients with metabolic syndrome: OB + MS 1 (−19%, p = 0.0064), OB + MS 3 (−16%, p = 0.0282), OB + MS 6 (−18%, p = 0.0085) and OB + MS 12 (−21%, 0.0007), the activity of SOD was also lower in every time period after the surgery than in lean individuals, whereas we did not observe any changes in patients with morbid obesity without metabolic syndrome at the same time period. Here, SOD1 is linked to morbid obesity.