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AST Test Test

An AST blood test measures the amount of AST (aspartate aminotransferase) in your blood. It is commonly used to help diagnose liver damage or disease.

What this test measures

The AST test measures the level of aspartate aminotransferase, an enzyme found mainly in the liver but also in the heart, muscles, and other tissues. When these cells are damaged, AST is released into the blood.

What your results mean

Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.

Higher-than-normal results

High levels of AST in the blood may be due to liver disease or other liver problems, such as hepatitis, cirrhosis, mononucleosis, heart procedures or problems, pancreatitis, hemochromatosis, deep burns, seizures, use of drugs toxic to the liver (especially alcohol), or surgery.

Lower-than-normal results

Low levels of AST in the blood are usually considered normal.

Frequently asked questions

What is an AST test?

An AST blood test measures the amount of AST (aspartate aminotransferase) in your blood. It is commonly used to help diagnose liver damage or disease.

What does AST stand for?

AST stands for aspartate aminotransferase. It is also called SGOT test or serum glutamic oxaloacetic transaminase test.

Why might I need an AST test?

An AST test is often part of a routine blood screening to check the health of your liver. It may help diagnose or monitor liver problems or other health conditions.

What does a high AST level mean?

High levels of AST may be due to liver disease or other liver problems, such as hepatitis, cirrhosis, mononucleosis, heart problems, pancreatitis, hemochromatosis, burns, seizures, or use of drugs toxic to the liver, especially alcohol.

What does a low AST level mean?

Low levels of AST in the blood are usually considered normal.

Related lab tests

Sources

Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.