Aspartate aminotransferase 39.67 U/L is classified as a normal value and is usually not serious and normal if there are no other indicators of abnormality or discomfort. Aspartate aminotransferase, also known as glutamate aminotransferase (abbreviated as AST), is a type of aminotransferase that is found mainly in cardiac muscle cells and liver cells. The normal value in serum is 0~40 U/L under normal conditions, and the concentration in serum increases when liver cells are damaged, and common diseases include viral hepatitis, fatty liver, alcoholic hepatitis, cirrhosis, and biliary tract obstruction When aspartate aminotransferase 39.67 U/L is located within the normal value range, it is normal. However, if the patient has abnormalities in other indicators such as bilirubin and albumin, or if the patient has obvious discomfort, it is recommended to consult a doctor in time to find out the cause of the disease and carry out targeted treatment to avoid delaying the condition.