GPT and Obesity: A recent meta-analysis, based on 14 clinical trials, evaluating the impact of supervised exercise interventions on obesity and hepatic functions in a cohort of 1231 obese youths aged between 7 and 18 (including 821 in the exercise group vs. 410 in the control group) demonstrated a significant reduction in visceral, subcutaneous and intrahepatic fat, as well as GGT activity (but no change in AST and ALT).