Mild fatty liver transaminases are usually ≥40 U/L, with specific values varying from person to person. Transaminases, also called serum aminotransferases, are a group of enzymes that catalyze the amino transfer reaction between an amino acid and an a-keto acid. Currently, the main aminotransferases used in liver function tests are alanine aminotransferase (ALT) and aspartate aminotransferase (AST). In simple fatty liver disease, liver function is essentially normal or there is a mild elevation of gamma-glutamyl transpeptidase. In steatohepatitis, elevated serum aminotransferase and gamma-glutamyl transpeptidase levels are often seen, usually dominated by elevated ALT. Alcoholic fatty liver can have mild elevation of serum AST and ALT. Therefore, mild fatty liver transaminases are usually mildly elevated or normal. When mild fatty liver elevations are present, both transaminases typically show normal presentation or show mild elevations without a substantial multiplicative increase, i.e., ≥40 U/L. Mild fatty liver patients with abnormal transaminase index should consult a doctor, under the guidance of the doctor standardized medication treatment.