Aspartate Aminotransferase (AST)
Liver enzyme also found in heart and muscle. An AST:ALT ratio > 2 suggests alcoholic liver disease.
Typical normal range
10–40 U/L
If high ↑
Liver damage, muscle injury, heart attack, hemolysis
If low ↓
Generally favorable
What is a normal Aspartate Aminotransferase level?
A typical reference range is 10–40 U/L. Ranges vary between laboratories and can depend on age and sex, so compare your result with the range printed on your own report.
What does a high Aspartate Aminotransferase level mean?
Liver damage, muscle injury, heart attack, hemolysis. A single result rarely gives a diagnosis on its own; your doctor will interpret it alongside your symptoms and other tests.
What does a low Aspartate Aminotransferase level mean?
Generally favorable. Your doctor will interpret it alongside your symptoms and other tests.
About the Liver Panel
Liver tests measure enzymes and proteins made by the liver. Raised levels can point to inflammation or damage, and they are often checked when starting certain medicines.
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Medical disclaimer: Reference ranges vary by laboratory, age, sex, and clinical context. This page is for educational purposes only and is not a diagnosis. Always discuss your results with a qualified healthcare professional.