A liver function test (LFT) is a group of blood tests that measure the levels of enzymes and proteins in your blood to assess your liver’s health. LFTs are also known as liver panels or hepatic panels.
What does an LFT test measure?
- Albumin: A protein produced by the liver
- Alkaline phosphatase (ALP): An enzyme produced by the liver that helps break down proteins
- Alanine aminotransferase (ALT): An enzyme produced by the liver
- Aspartate aminotransferase (AST): An enzyme produced by the liver
- Bilirubin: A substance released by the liver into bile
- Gamma-glutamyl transferase (GGT): A substance produced or excreted by the liver
- Prothrombin time (PT): A measure of how long it takes for blood to clot
Why do you get an LFT?
- To check for liver disease
- To monitor liver disease over time
- To check for side effects of certain medications
How is an LFT performed?
- A healthcare technician draws blood from a vein in your arm
- The blood sample is sent to a lab for testing
What are the results of an LFT?
- Higher or lower than normal levels of enzymes and proteins may indicate liver problems
- The results can help your doctor determine the next steps