AST
What it measures
AST is an enzyme found in the liver and other tissues, including muscle, released into the blood when those cells are stressed.
Often reported in U/L. Reference ranges differ between laboratories, ages and sexes, so always compare with the range printed on your own report.
Why it matters
Because AST isn't liver-specific, it's usually interpreted alongside ALT to help clarify whether the liver is the likely source.
Questions worth asking
- How does this compare with my ALT result?
- Could recent intense exercise or muscle strain be relevant?
- Is further liver evaluation worth discussing?
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Educational information only. Not a diagnosis, not treatment advice, and not a substitute for a licensed healthcare professional.