GPT and metabolic syndrome: Another diagnostic criteria is unexplained serum ALT and (or) AST, GGT continue to increase for more than half a year, accompanied by metabolic syndrome related components, after losing weight and improving insulin resistance, fatty liver imaging and liver enzyme abnormalities improve or return to normal.[2] NAFLD has been a leading cause of chronic metabolic disease, which is closed associated with obesity, diabetes and other metabolic diseases.[3] The number of NAFLD patients worldwide is increasing year by year, among them, young people also account for a large proportion.