Glutamyl transpeptidase, >50U/L in men and >32U/L in women is abnormal. Glutamyl transpeptidase, if 92U/L glutamyl transpeptidase, suggests hepatobiliary system disease or a large amount of high-protein diet, which is more serious if caused by the former. Serum glutamyl transpeptidase is mainly derived from the liver, if this enzyme is elevated, it generally suggests hepatobiliary system diseases, such as bile duct obstruction caused by stones or tumors, intrahepatic cholestasis caused by alcoholic liver disease, and primary liver cancer, especially cholangiocellular carcinoma. In addition, pancreatitis, pancreatic cancer, kidney disease, prostate cancer, etc. can also lead to elevated glutamyl transpeptidase. It should be noted that when a large amount of high-protein diet can also lead to an increase in glutamyl transpeptidase. Therefore, when there is an elevation of this index, one should consult a doctor in time, inform the doctor of the medical history in detail, complete the relevant examinations, identify the cause and treat the symptoms.