|Fasting or Non-fasting||Non-fasting|
|Turnaround Time for Results|
The ALT test (formerly called the serum glutamic pyruvic transaminase or SGPT) measures the level of enzyme called alanine aminotransferase in the blood. ALT is present in the cells of the liver and kidney and, in smaller amounts, in the heart and muscles. Normally, ALT levels in the blood are low; however, ALT is released into the blood after liver injury and can be used as a marker for liver damage.
The ALT test is a simple blood test collected via venipuncture. The results are reported as units per liter (U/L). Normal blood ALT levels vary between women and men and should be below 35 to 40 U/L.
Higher than normal ALT levels in blood can result from:
- Liver damage or disease (such as hepatitis)
- Certain medications (such as acetaminophen and statins)
- Over-consuming alcohol
Am I required to fast for this test?
No, you do not need to fast for this test. However, if you are concurrently having another test done that requires fasting, you need to fast for that test as indicated.
What are normal levels?
Normal blood ALT levels usually range from 10 to 40 U/L in men and 7 to 35 U/L in women.1 The normal values can vary depending on the laboratory. The exact range will be indicated on your report.
What are abnormal levels?
Increased ALT levels in blood usually indicate liver damage.
Why do I need it?
If you suffer from jaundice, hepatitis, or other signs of liver disease, you may consider having this test done. The test may also be done to as a part of a routine liver function test.
What type of doctor should I see if results are abnormal?
See your primary health care provider who may refer you to a specialist, such as a gastroenterologist.