GPT and type 2 diabetes mellitus: In the T2DM patients, the level of other fecal bacteria correlated positively with the ALT (r = 0.331, p = 0.011), AST (r = 0.258, p = 0.049), and γ-GTP (r = 0.300, p = 0.021) levels, correlations that were not apparent in the control subjects.