GGT is gamma-glutamyltransferase, an indicator of liver function tests, and its elevation is mainly seen in hepatobiliary diseases, such as chronic hepatitis, cirrhosis, and acute and chronic cholecystitis. GGT is most abundant in the biliary tract and liver cells, and is one of the important enzymes involved in amino acid metabolism in the human body, playing an important role in protein metabolism. GGT release can be increased when liver cells or tissues are damaged. Its elevation alone is mainly an early manifestation of liver disease or biliary tract disease, and as the disease progresses, the rest of the indicators of liver function will also become abnormal. In addition, heavy drinking can also cause GGT to rise, and it is more sensitive to the stimulation of alcohol, so if there is a history of drinking before the blood is drawn, it can be considered to be the effect of alcohol consumption. When one of the indicators of GGT is elevated, patients should not judge or diagnose on their own, but should consult a doctor in time, who will analyze and diagnose the problem according to the specific situation.