GPT and type 2 diabetes mellitus: The median values of serum ALT, AST, and GGT activities were significantly (P < 0.05) elevated among T2DM patients with a duration of illness greater than 5 years (Fig 1A), those who smoked (Fig 1B), those who were physically inactive (Fig 1C), those with comorbidities (Fig 1D), and those who were obese or overweight (Fig 1E), compared to those with a duration of illness less than 5 years, non-smokers, physically active individuals, those without comorbidities and those with a healthy weight, respectively.