Since circulating liver enzymes including aspartate aminotransferase (AST), alanine aminotransferase (ALT), and Gamma glutamyltransferase (GGT) are commonly elevated in asymptomatic patients with NAFLD [5,6], the prospective association between the hepatic markers and type 2 diabetes is expected, as has been reported in many longitudinal studies [7-12]. This evidence concerns the gene GPT and type 2 diabetes mellitus.