SOD1 and obesity due to melanocortin 4 receptor deficiency: However, when comparing these biomarkers and considering pre-pregnancy maternal BMI, significant differences were found in SOD concentrations between women with obesity and women with normal weight (311 U/mL vs 206 U/mL, p = 0.019), and between women with overweight and those with normal weight (SOD 289 vs 206 U/mL, p = 0.002).