GGT (Gamma-Glutamyl Transferase): About Your Child's Test

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What is it?

A gamma-glutamyl transferase (GGT) test is a test to look for GGT in your child's blood. GGT is a protein (enzyme) that speeds up chemical reactions in the body. It's found mainly in the liver and the bile ducts. It's also called gamma-glutamyl transpeptidase.

Why is this test done?

The test is done to check for liver disease and bile duct blockage in children. It's also done when a child may have swallowed drugs or alcohol by accident. The GGT test is usually done along with other tests, such as alanine aminotransferase (ALT).

How do you prepare for the test?

In general, there's nothing you have to do before this test, unless your doctor tells you to.

How is the test done?

A health professional uses a needle to take a blood sample, usually from the arm.

How long does the test take?

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 if your child is having problems. Ask your doctor when you can expect to have your child's test results.

The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.