A Liver Function Test (LFT) is a group of blood tests that measure various enzymes, proteins, and substances produced by the liver. It typically includes bilirubin (total, direct, indirect), SGOT/AST, SGPT/ALT, alkaline phosphatase (ALP), total protein, albumin, and globulin levels. These values help assess liver health and detect conditions such as hepatitis, fatty liver, liver infection, alcohol-related damage, or bile duct obstruction. Doctors often recommend an LFT when symptoms like jaundice, abdominal pain, fatigue, dark urine, or loss of appetite indicate possible liver issues.

For the LFT, a small blood sample is collected from a vein, and fasting for 8–12 hours may be recommended for more accurate results, depending on your doctor’s advice. This test helps diagnose liver diseases, monitor treatment progress, and evaluate the effects of medications on liver function. LFT is commonly done as part of routine health checkups or when monitoring chronic liver conditions.