Glutathione is clinically abbreviated as ALT. Acute viral hepatitis, chronic viral hepatitis and other diseases may cause ALT elevation, and its adverse effects are mainly liver injury and other organ dysfunctions. 1. Acute viral hepatitis: ALT mainly exists in the liver, when acute inflammation occurs in the liver, a large number of hepatocyte necrosis, ALT is obviously elevated, up to 20-50 times of the normal value, which can cause fever, abdominal pain, nausea and other symptoms, followed by jaundice, and easy to develop into severe hepatitis and so on. 2. Chronic viral hepatitis: chronic hepatitis has a long course, ALT elevation can indicate that chronic hepatitis may enter the active stage, which may further cause cirrhosis, resulting in splenomegaly, ascites, jaundice and other symptoms. 3. Other diseases: Since ALT is not only found in the liver, but also in the kidneys, myocardium and other organs, ALT will be mildly elevated in lungs, kidneys and myocardium, causing dysfunction of these organs. Only based on the test results of ALT elevation can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of the doctor.