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Interpret Your Aspartate Aminotransferase Results
Enter your AST value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.
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Aspartate Aminotransferase Normal Ranges
AST is an enzyme found in liver, heart muscle, skeletal muscle, kidneys, brain, and red blood cells.
| Age Group | Sex | Reference Range | Unit | Notes |
|---|---|---|---|---|
| Adults (18–64) | Male | 10 – 40 | U/L | — |
| Adults (18–64) | Female | 10 – 35 | U/L | — |
Also reported in: IU/L.
Common Causes of High AST
Liver diseases (hepatitis, cirrhosis, NAFLD) — same as ALTAcute myocardial infarction (MI)Skeletal muscle injury or rhabdomyolysis
Common Causes of Low AST
Not clinically significantVitamin B6 (pyridoxine) deficiency (cofactor for AST — may falsely lower AST)
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