Glutathione can be checked by the Department of Gastroenterology or the Department of Infectious Diseases. The liver is an important organ in the digestive system, and glutathione is mainly found in liver cells. When liver cells are damaged, glutathione can be released into the blood, and glutathione in the serum will rise. Glutathione is also sensitive, doubling when liver cells are damaged by 1%. There are many causes of liver damage. If the liver damage is caused by a virus, it is an infectious disease and can be seen by the infectious disease department. If there are other causes, such as liver damage caused by alcohol or liver damage caused by drug intoxication, you can go to the gastroenterology department for treatment.