The normal value of gamma-glutamyltransferase is between 0 and 50 U/L, so 150 U/L is on the high side and implies that liver impairment is present. Gamma-glutamyltransferase is an enzyme secreted by liver cells, and physiologic factors for elevation include late nights, heavy drinking, and strenuous activity. Pathologic factors can be seen in liver disease, biliary tract disease and other conditions. 1. Liver disease: when suffering from viral hepatitis, alcoholic hepatitis, fatty liver disease and drug liver injury, etc., it may lead to gamma-glutamyltransferase elevation. 2. Biliary tract diseases: biliary tract obstruction such as biliary tract tumors and biliary tract stones can lead to impaired excretion of γ-glutamyltransferase, which can cause elevated γ-glutamyltransferase. After checking out the gamma-glutamyltransferase elevation, it is recommended to go to the hospital in time, after the doctor’s interview, combined with the relevant items of examination, to clarify the cause of the disease, and for the cause of the disease treatment.