Glutamyl transpeptidase, abbreviated as GGT, is present in kidney, pancreas, liver, spleen, intestine, brain, lung, skeletal muscle and cardiac muscle, etc. In the liver, it is mainly present in the hepatocyte plasma and intrahepatic bile duct epithelium. It has some clinical diagnostic value for various hepatobiliary diseases. The reasons for high glutamyl transpeptidase 170 are as follows: 1.Alcoholic hepatitis and alcoholic cirrhosis: it can be significantly elevated in alcoholics, and is an auxiliary indicator for diagnosing alcoholic liver disease, and can be decreased after quitting alcohol; 2.Acute and chronic viral hepatitis: viral hepatitis B is the most common in China; 3.Drug hepatitis: transpeptidase will be elevated when hepatocytes and intrahepatic capillary system are damaged; 4.Liver Malignant tumor: GGT can rise significantly in patients with this disease; 5. autoimmune liver disease: when causing the increase of various enzymes, generally the increase of GGT is dominant; 6. rare can also be fatty liver, pancreatitis, tumor of the pancreas and prostate tumor, etc. To sum up, there are different causes of elevated glutamyl transpeptidase, which need to be treated for different reasons. If you find elevated glutamyl transpeptidase to 170U/L, you should go to the hospital immediately and further clarify the diagnosis according to the imaging test results.