Liver function tests can be performed by drawing blood, as well as by coagulation function, abdominal ultrasound, and viral hepatitis indicators. There is more than one liver function test, which mainly includes the levels of proteins and enzymes in the blood, and the serum concentrations of these substances are used to determine whether the liver function is normal or not, which mainly include the following: Alanine aminotransferase and aspartate aminotransferase, also known as glutamic acid aminotransferase and glutamic acid aminotransferase, are elevated and often indicate liver damage. Bilirubin is produced when red blood cells rupture, and under normal conditions, the liver metabolizes bilirubin. A high level of bilirubin in the blood suggests that the patient may be experiencing liver damage. Albumin and globulin: The liver produces two proteins, albumin and globulin, and low levels of albumin and globulin can indicate liver damage or disease. In addition, further tests for viral hepatitis indicators, abdominal ultrasound to observe the morphology and structure of the liver, checking the coagulation function, assessing the synthetic function of the liver and whether the liver is damaged, etc. are also needed. The basic check for liver function is a blood test. Generally, test values within the normal range indicate normal liver function, and it is important to consult your doctor if any test values are abnormal.