Liver Function Tests

A group of enzymes and proteins that assess the health of the liver.

Fasting: please check

Last updated: May 1, 2026

Test name

Liver tests include enzymes (ALT, AST, ALP, GGT), bilirubin and albumin. Abnormal values can indicate liver damage or a problem with the bile ducts.

It is ordered when hepatitis is suspected, during long-term medication use, with alcohol use, or for unexplained fatigue or jaundice.

Light fasting is often recommended; avoid alcohol for 24 hours before the test.

A standard venous blood draw.

Raised ALT/AST points to liver-cell damage, while raised ALP/GGT points to a bile-duct problem. Results should be assessed by a gastroenterologist.

A widely used screening test that evaluates red cells, white cells and platelets in the blood.