Serum Glutamic-Pyruvic Transaminase/Alanine Aminotransferase (SGPT/ALT)

What is SGPT test?

An alanine aminotransferase (ALT) test measures the level of ALT in your blood. ALT is an enzyme made by cells in your liver (healthline).

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Why do you need to take this test?

The ALT test is usually used to determine whether someone has liver injury or failure. Your doctor may order an ALT test if you’re having symptoms of liver disease, including:

  • jaundice, which is yellowing of your eyes or skin
  • dark urine
  • nausea
  • vomiting
  • pain in the right upper quadrant of your abdomen

Liver damage generally causes an increase in ALT levels. The ALT test can evaluate the levels of ALT in your bloodstream, but it can’t show how much liver damage there is or how much fibrosis, or scarring, is present. The test also can’t predict how severe the liver damage will become.


You should tell your doctor about any prescription or over-the-counter medications you’re taking. Some drugs may affect the levels of ALT in your blood. It is because your doctor might tell you to avoid taking certain medications for a period of time before the test.


You should get your results in about a day. A normal ALT test result can range from 7 to 55 units per liter (U/L).

Any questions? Please don’t hesitate to contact us. We will do our best to help you.