Glutamyl transpeptidase 80 U/L is not normal. Glutamyl transpeptidase is mainly used to diagnose hepatobiliary diseases and is an indicator of biliary obstruction and hepatitis activity, with a normal value of 5 to 50 U/L, while a measurement of 80 U/L suggests that it is elevated. Elevated glutamyl transpeptidase may have the following causes: 1. In primary or metastatic hepatocellular carcinoma, glutamyl transpeptidase in blood is obviously elevated. 2. Obstructive jaundice, acute hepatitis, active chronic hepatitis, biliary tract infections, and cirrhosis can elevate glutamyl transpeptidase. 3. Other diseases such as myocardial infarction, acute pancreatitis and certain medications can elevate glutamyl transpeptidase in the blood. If you have elevated glutamyl transpeptidase, you need to go to the hospital as soon as possible, and the doctor will formulate individualized diagnosis and treatment plan according to your specific condition, so as to avoid delaying your condition.