GPT and liver disorder: The mean baseline values of hepatobiliary enzymes including aspartate aminotransferase (AST), ALT, and γ-glutamyl transpeptidase (γ-GTP) increased with the progression of hepatic risk from the low-risk group to the high-risk group compared with the values in the original population, and all these values showed a significant improvement in both subpopulations, including the present cohort of subjects selected as at high risk for liver disease (Table 3).