Top of the page
An alanine aminotransferase (ALT) test measures the amount of the enzyme ALT in the blood. ALT is found mainly in the liver. When ALT levels are higher than normal, it can mean that the liver is damaged or diseased.
The ALT test is done to:
In general, you don't need to do anything before your child has this test. Your doctor may give you some specific instructions.
A health professional takes a sample of your child's blood.
The test will take a few minutes.
Follow-up care is a key part of your child's treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if your child is having problems. Ask your doctor when you can expect to have your child's test results.
Go to https://www.healthwise.net/patientEd
Enter A250 in the search box to learn more about "Alanine Aminotransferase (ALT): About Your Child's Test".
Current as of: March 28, 2019
Author: Healthwise Staff
Medical Review:John Pope MD - Pediatrics & Thomas M. Bailey MD - Family Medicine
Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.
©2006-2019 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.