The observed lack of association of GSTM1 genotype with MDA, a product of oxidative damage resulting in lipid peroxidation, is consistent with reported results in other conditions, including diabetes [52,53], renal disease [36], and coronary artery disease [54], suggesting that this polymorphism has an insignificant effect on lipid peroxidation in chronic disease states. Here, GSTM1 is linked to diabetes mellitus.