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Why is an alanine aminotransferase test important?

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This enzyme is found mainly in your liver. Smaller amounts of alanine aminotransferase (ALT) are in your kidneys and other organs, too. Your body uses ALT to break down food into energy. Normally, ALT levels in the blood are low. If your liver is damaged, it will release more ALT into your blood and levels will rise. (ALT used to be called serum glutamic-pyruvic transaminase, or SGPT). Doctors often give the ALT test along with other liver tests.

SOURCES:

American Association for Clinical Chemistry: "ALT."

Mayo Clinic: "Liver Disease: Definition." "Liver function tests."

Medscape: "Alanine Aminotransferase."

National Heart, Lung, and Blood Institute: "What To Expect With Blood Tests."

Nemours Foundation: "Blood Test: Alanine Aminotransferase (ALT, or SGPT)."

University of Rochester Medical Center: "ALT."

Reviewed by Jennifer Robinson on May 14, 2019

SOURCES:

American Association for Clinical Chemistry: "ALT."

Mayo Clinic: "Liver Disease: Definition." "Liver function tests."

Medscape: "Alanine Aminotransferase."

National Heart, Lung, and Blood Institute: "What To Expect With Blood Tests."

Nemours Foundation: "Blood Test: Alanine Aminotransferase (ALT, or SGPT)."

University of Rochester Medical Center: "ALT."

Reviewed by Jennifer Robinson on May 14, 2019

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Why should your doctor order an alanine aminotransferase test?

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