Glutamyl transpeptidase is a commonly used clinical biochemical test for liver function, with a normal value of 3-50 U/L. If the value of glutamyl transpeptidase is 66 U/L, it means that the result is abnormal and there is a mild elevation, and it is recommended to find out the cause in time, and then decide whether or not to take therapeutic measures according to the condition. Elevated glutamyl transpeptidase can be caused by a variety of reasons, including physiologic and pathologic causes. Physiological causes may be related to alcoholism, work or study stress, and even poor rest, overeating, exertion, and strenuous activities may cause mild elevation of glutamyl transpeptidase. Pathological causes may be caused by chronic hepatitis, alcoholic hepatitis, viral hepatitis, fatty liver and other liver diseases, the patient will experience weakness, nausea, pain in the liver area and other uncomfortable symptoms, and should be further examined for liver function, blood routine, biochemistry, tumor indexes, ultrasound and CT examination of the liver. If pathologic factors are considered, it is a medical disorder and requires antiviral, hepatoprotective, nutritional and other treatments. If it is a surgical factor, interventional minimally invasive surgery is needed to relieve obstruction and smooth biliary drainage, and generally glutamyl transpeptidase can be normalized. If it is a physiological factor, as long as you keep a good mindset, avoid alcoholism and smoking, glutamyl transpeptidase will gradually return to normal.