Panel guide
Liver Enzymes
ALT and AST are enzymes commonly included on metabolic panels.
General biomarker education — not personalized medical advice. Learn more
What they measure
ALT and AST are enzymes associated with liver and other tissues. Laboratories report them in units per liter (U/L) with method-specific ranges.
Why people track them
These markers often appear on CMP reports. Tracking confirmed values helps you bring a timeline rather than a single snapshot.
How to read your report
Isolated enzyme changes have many possible explanations. Use your clinician to interpret patterns alongside symptoms and history.
Important note
This is general information about laboratory markers. It is not a diagnosis, treatment plan, or personalized medical advice. Discuss your results with your clinician.
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Confirm extracted values against your source PDF. Charts use the range printed on that report.
See how it works →Questions for your clinician
- How should I think about ALT and AST together on this report?
- When would you recommend repeating these liver enzymes?