Gamma-Glutamyl Transferase (GGT)

GAMMA-GLUTAMYL TRANSFERASE (GGT) test

The test is commonly used as part of liver function evaluation and can help investigate conditions such as bile duct obstruction, liver inflammation, fatty liver disease, and other hepatobiliary disorders. GGT may also help determine whether an elevated alkaline phosphatase (ALP) level is likely related to the liver or bile ducts rather than the bones.

GGT levels can be influenced by alcohol consumption and certain medications, so results should be interpreted along with other liver tests such as ALT, AST, ALP, and bilirubin.

This Test is Recommended for Individuals:

• Individuals undergoing a liver health evaluation
• People with abnormal liver function test results
• Individuals with an unexplained elevated ALP level
• People with symptoms such as jaundice, dark urine, nausea, or abdominal discomfort
• Individuals with suspected bile duct obstruction or liver disease
• People being evaluated for fatty liver or other hepatobiliary conditions
• Patients taking medications that may affect liver function
• Individuals who require monitoring of an existing liver condition
• Patients whose healthcare provider recommends GGT testing as part of a liver panel

FAQs

1. What does a high GGT level indicate?
An elevated GGT level may indicate liver or bile duct irritation or injury. It can occur with conditions such as fatty liver disease, hepatitis, bile duct obstruction, and alcohol-related liver injury. However, GGT alone cannot identify the exact cause.

2. Does alcohol affect the GGT test?
Yes. Alcohol consumption can increase GGT levels, sometimes significantly. Certain medications and other health conditions can also affect the result. Your healthcare provider may advise avoiding alcohol before testing depending on the purpose of the test.

3. Is fasting required for a GGT test?
Fasting requirements can vary depending on whether GGT is being performed alone or as part of a larger liver panel. Follow the specific preparation instructions provided by your healthcare provider or diagnostic laboratory.