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Common causes of a low Aspartate Aminotransferase (AST)
- Vitamin B6 deficiency (rare)
Looking for the other direction? See what causes a high Aspartate Aminotransferase (AST).
All tests · Liver Function (LFTs) · Aspartate Aminotransferase (AST)
Below the range
What causes a low Aspartate Aminotransferase (AST)?
Normal range 10-40 U/L (0.17-0.67 µkat/L SI). Specimen: Serum. See the full Aspartate Aminotransferase (AST) reference page for critical values and nursing considerations.
What is the normal range for Aspartate Aminotransferase (AST)?
The standard teaching reference range for Aspartate Aminotransferase (AST) is 10-40 U/L in conventional units, or 0.17-0.67 µkat/L in SI units. This value is measured in serum.
| Specimen | Serum |
|---|---|
| Conventional range | 10-40 U/L |
| SI range | 0.17-0.67 µkat/L |
| Panel | Liver Function (LFTs) |
Full details, including nursing considerations, on the Aspartate Aminotransferase (AST) normal range page. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
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