Blood.

Inform your doctor if you are on any medications or have any underlying medical conditions or allergies before undergoing this test. Fasting of 8 hours is usually recommended before this test.

5 Hours.

Liver function test is a set of blood tests used to monitor the working of the liver or to screen the liver damage or inflammation. . This test also measures the amount of certain enzymes and proteins in the blood. Some of these tests are helpful in estimating the performance of the liver functions like producing proteins, clearing of waste products in blood like bilirubin and some tests are used to measure the amount of enzymes that are produced by the liver which may indicate damage of the liver.