AST (Aspartate Aminotransferase)
AST is an enzyme in the liver and heart. It rises with liver damage, heart attack, or muscle injury.
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Normal ranges
Men: 10–40 U/L. Women: 7–35 U/L.
Units: U/L
Causes of deviations
Low levels:
Usually not clinically significant.
High levels:
Hepatitis, heart attack, muscle injury, statins.
When to see a doctor
If elevated, especially together with ALT.
Related biomarkers
Panels
Liver panel
Conditions
Liver disease
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