GPT and fatty liver disease: Some steatosis scores have also been developed, mainly the fatty liver index (combining in its formula triglycerides, GGT, BMI, and waist circumference, being positive if >60) and the hepatic steatosis index (combining in its formula AST, ALT, BMI, and T2DM, being positive if >36) and can be used whenever imaging tools are not available or for wide epidemiologic studies [49,63].