SGPT/ALT

What Is an ALT Blood Test?

The alanine aminotransferase (ALT) test is a blood test that checks for liver damage. ALT used to be called serum glutamic-pyruvic transaminase (SGPT). So, it’s sometimes called an SGPT test. Your doctor can use this test to see if a disease, drug, or injury has damaged your liver.

Tracking your liver’s health is important because of all the things it does for you. Your liver:

• Makes a fluid called bile that helps your body digest food
• Filters your blood to remove wastes and toxins
• Makes substances that help your blood clot
• Stores vitamins and minerals until you need them
• Removes excess sugar from the blood

Toxins (including alcohol), infections, and various illnesses can cause damage to the liver.