Previous studies have reported associations of SNPs SOD2 rs4880, GPX7 rs835337, GPX1 rs1050450, CAT rs1001179 with obesity, body mass index and body fat in Brazilian, Mexican, British, Finnish, Chinese, Caucasian, and African–American adult populations [10,12,13,21,22,23]. This evidence concerns the gene GPX1 and obesity due to melanocortin 4 receptor deficiency.