Regarding the GSTP1 genotypes, Ile/Ile frequency in T2DM patients was 58.3% and 73.5% in controls and Ile/Val frequency was 28.6% in T2DM patients and 21.4% in controls while the frequency of Val/Val genotypes was 13.1% in diabetic patients and 5.1% in controls (p = 0.05). Here, GSTP1 is linked to type 2 diabetes mellitus.