What causes high levels of gulanyl transferase?

The normal value of gulanyl transferase is between 0-40u/l. If the value of gulanyl transferase is high, liver diseases such as chronic hepatitis, liver cirrhosis, icteric hepatitis, etc. may be considered; for patients who take antiepileptic drugs for a long time, there will also be elevated phenomenon of gulanyl transferase. You'd better go to the liver department of a regular hospital for examination.