Gamma-glutamyl transferase (GGT), often referred to as gamma GT, is a type of blood test that healthcare providers order to check for signs of liver damage or a bile duct blockage. It measures the amount of GGT, which is an enzyme, present in your blood.
What is GGT?
GGT is an enzyme found throughout the body, with the highest concentrations in the liver. It plays a role in various metabolic processes within the cells. While GGT is present in several organs, its elevated levels in the bloodstream are primarily associated with the liver and bile ducts.
Why is a Gamma GT Test Performed?
A healthcare provider typically orders a GGT test to:
- Check for liver damage: It helps identify if the liver has been harmed or is not functioning correctly.
- Detect a bile duct blockage: This test can indicate if there's an obstruction in the bile ducts, which are tubes that transport bile from the liver to the small intestine.
The GGT test is often used alongside other liver function tests to provide a comprehensive picture of liver health and to help distinguish between different types of liver or bile duct conditions.
Understanding Your Gamma GT Results
High levels of GGT in your blood can indicate a variety of health conditions. While most commonly linked to the liver, elevated GGT can also suggest issues affecting other organs:
- Liver Conditions: High GGT levels are a strong indicator of liver damage, which could be due to various causes impacting the liver or bile ducts.
- Heart Conditions: Elevated GGT can also be associated with certain conditions affecting the heart.
- Other Organ Issues: In some cases, high GGT levels may point to health conditions in other parts of the body beyond the liver and heart.
