An ALT liver function test measures the amount of alanine transaminase (ALT) in the blood. ALT is an enzyme primarily found in the liver. High levels of ALT in the blood can indicate liver damage or disease.
Understanding ALT and Liver Function
- ALT (Alanine Transaminase): An enzyme mainly located in the liver cells.
- Function: When liver cells are damaged, ALT is released into the bloodstream.
- ALT Test: A blood test that measures the level of ALT to help detect liver injury or disease.
Why is an ALT Test Performed?
An ALT test is conducted to:
- Detect Liver Damage: High ALT levels can be a sign of liver inflammation (hepatitis) or damage from other causes.
- Monitor Liver Disease: For individuals with known liver conditions, ALT tests help track the progress of the disease and the effectiveness of treatment.
Interpreting ALT Test Results
While normal ranges can vary slightly between laboratories, elevated ALT levels often suggest:
- Liver Disease: Hepatitis, cirrhosis, or liver cancer.
- Medication Side Effects: Certain medications can cause liver damage and elevate ALT levels.
- Other Conditions: Such as bile duct problems.
A doctor will interpret the results in the context of your overall health and other test results.
