Glutamyl transpeptidase 100 U/L, which is higher than the normal standard, indicates that the patient may have biliary obstructive disease, acute and chronic hepatitis, cirrhosis and other diseases. Glutamyl transpeptidase test is a common indicator for liver function tests in clinical practice. Normal standards are 11-50 U/L for men and 7-32 U/L for women. glutamyl transpeptidase is widely present in the liver, distributed on the capillary bile duct side of hepatocytes and throughout the biliary system. When hepatic synthesis is hyperactive or biliary excretion is obstructed, it increases serum glutamyl transpeptidase values. When patients have obstructive biliary diseases, such as sclerosing cholangitis and tumors of the biliary system, it will cause cholestasis, leading to an increase in serum glutamyl transpeptidase; acute and chronic hepatitis, cirrhosis and other diseases lead to hepatocellular damage, and enzymes in the hepatocytes will be released into the bloodstream, causing an increase in glutamyl transpeptidase. When the patient’s glutamyl transpeptidase 100U/L, higher than the normal value, suggests that the patient may have related diseases, and suggests that the patient go to the hospital for examination and treatment in time.