A doctor usually requests GGT along with other tests to evaluate a person who has signs or symptoms that suggest liver disease. Some of the symptoms of liver injury include jaundice, nausea, vomiting, abdominal (around the stomach area) swelling, abdominal pain, pruritus (severe itching), and tiredness.GGT is increased in most diseases that cause damage to the liver or bile ducts, but is usually not helpful in distinguishing between different causes of liver damage as a single test. However there are studies that indicate GGT can be used together with other markers as diagnostic scores to predict the presence of liver fibrosis and also for non-alcoholic fatty liver disease. In people with a history of alcohol abuse who are undergoing treatment, GGT may be used to check that the person is following the treatment program properly.
