Glutamyltransferase 120 U/L is greater than the normal range and may be caused by physiologic factors such as alcohol consumption, or by diseases such as hepatitis and fatty liver disease, which need to be taken seriously. The normal range of glutamyltransferase is less than 64 U/L for men and less than 45 U/L for women. Glutamyltransferase is found in the cell membranes and mitochondria of hepatocytes, and when hepatocytes are damaged, glutamyltransferase can be elevated. It can be seen in viral hepatitis, people who are alcoholics, fatty liver and other diseases. In viral hepatitis, liver cells become degenerated and necrotic, leading to the release of glutamyltransferase into the serum, causing an increase in values. Alcoholics can also cause mild elevations that return to normal after abstinence. In patients with fatty liver disease, there is also damage to the liver cells that can cause glutamyltransferase to rise. There are many factors that can cause the increase of glutamyl transferase, you should go to the hospital in time, complete the relevant examinations to clarify the cause, and treat the symptoms under the guidance of the doctor.