GPT and fatty liver disease: Participants were mostly men with a mean age of 48.9 ± 1.0 years, representing habitual alcohol drinkers (>260 g/week) with hepatic damage (ALT 40.6 ± 2.1 IU/L, AST 31.4 ± 1.3 U/L, GGT 96.6 ± 3.9 U/L, and fatty liver).