A blood test for aspartate aminotransferase (AST) determines the concentration of this enzyme in the blood. Typically, results are available within 12 hours.
- The usual values indicated here—referred to as a reference range—are provided as a reference only.
- These ranges vary by laboratory, and your lab may have a different definition of what is considered normal.
- Your laboratory report should provide the range that your laboratory uses.
- Additionally, your physician will assess your results in light of your health and other relevant circumstances.
- This means that a value that is outside the range of the typical values indicated here may nevertheless be considered normal for you or your laboratory.
AST Normal Values
||14–40 units per litre (U/L)
*The values in the table depict the international reference range. The actual range may vary with the diagnostic test used, laboratory, patients’ age, and allergen type.
- Increased AST levels may be caused by the following: Liver damage caused by hepatitis or cirrhosis.
- A coronary artery bypasses graft or heart failure.
- Numerous medications, including statins, antibiotics, chemotherapy, aspirin, opioid pain medications, and barbiturates.
- Extremely vigorous exertion or a significant muscle injury.
- Vitamin A at high doses.
- Damage to the kidneys or lungs.
- Certain forms of cancer.
To understand the test report, it is important to know the enzyme’s reference range below:
- Men have a normal AST range of 10 to 40 units/L, while women have a normal range of 9 to 32 units/L.
- If the test results exceed the SGOT normal range, it indicates that the organ containing the enzyme may have been harmed.