Aminotransferases may appear high when measured after eating breakfast. Transaminase is an enzyme that catalyzes the transfer of amino acids between amino acids and keto acids, and it is widely found in the liver, heart and other cells. After eating breakfast, the liver will secrete bile to participate in digestion, which may increase the level of transaminase, so the transaminase test after breakfast may be high, and it is generally recommended to take a blood sample on an empty stomach for the test. Elevated aminotransferase is also associated with excessive alcohol consumption, strenuous exercise, taking medication and other factors, may be due to liver disease, biliary tract disease and other diseases, the occurrence of elevated aminotransferase should be repeated under the guidance of a physician or change the other test, in order to detect the disease in a timely manner, which is conducive to the timely rescue and treatment.