What does this test include?
This panel measures AST, ALT and GGT. The pattern can point toward liver-cell injury, bile-duct involvement or a non-liver source such as muscle, but the panel does not measure all aspects of liver function.
Why might it be ordered?
- To investigate symptoms or previous results suggesting liver or bile-duct injury.
- To monitor a liver condition or treatment that may affect liver enzymes.
What sample is needed?
A blood sample is required. The laboratory chooses the correct tube and handles the sample for this test.
How should you prepare?
Ask the laboratory whether you need to fast or attend at a particular time. Do not stop or change medicines or supplements unless your clinician tells you to.
How are the results reported?
The relative changes and trends are more useful than one isolated enzyme. Bilirubin, alkaline phosphatase, albumin and imaging may be needed for a fuller assessment.
Sources and editorial status
This patient-facing text is an editorial draft. It should be approved by a laboratory physician before official publication.