AST (Aspartate Aminotransferase) – AST is an enzyme found in the liver and other tissues. It rises when those cells are stressed or damaged.
What AST measures
AST measures possible liver (and sometimes muscle) stress – usually read alongside ALT.
Typical ranges
Roughly 10-40 U/L, varying by lab. Reference ranges differ between laboratories and by age and sex, so always read your result against the range printed on your own report.
What high results can mean
Can reflect liver stress, muscle injury, or other causes; interpreted with ALT and history.
What low results can mean
Not typically a concern.
How the test is done
A blood sample; often part of a liver or metabolic panel. At-home collection works well for this marker when the sample is processed by a certified lab.
FAQ
What is a normal AST level?
Roughly 10-40 U/L, varying by lab. Your ideal target depends on your age, sex, and health history, so review results with a clinician.
What does a high AST result mean?
Can reflect liver stress, muscle injury, or other causes; interpreted with ALT and history.
Can I test AST at home?
Yes. A blood sample; often part of a liver or metabolic panel. An at-home sample processed by a certified lab gives reliable results.
This article is educational and not a substitute for medical advice. Discuss your results with a qualified clinician.