FaridabadBy Dr B.C. Gupta, MD · 2026-08-15
A liver function test, or LFT, is a group of blood tests that checks how well your liver is working. It measures enzymes and proteins made by the liver.
What does the test measure?
An LFT typically measures several things. Liver enzymes such as ALT, AST, and ALP can rise when liver cells are damaged or inflamed. Bilirubin is a waste product the liver processes; high levels can cause yellowing of the skin and eyes. Albumin and total protein reflect how well the liver is making proteins.
How to prepare
Some LFTs may require fasting, so confirm with the laboratory before your visit. The sample is a blood draw, and results are usually available the same day.
What the result can mean
Raised liver enzymes can point to liver inflammation or damage from causes such as fatty liver, alcohol, infection, or medication. High bilirubin can indicate a problem with processing bile. Low albumin can reflect reduced liver function. These are general patterns. Many things cause mild, temporary rises, so your doctor will interpret the results with your history and may repeat the test.
When is it ordered?
An LFT is ordered to investigate symptoms such as tiredness, jaundice, or abdominal discomfort, to monitor a known liver condition, to check the effect of certain medicines, or as part of a routine health check.
This article is for general information only and is not medical advice. Always discuss your results and any health concerns with your doctor.
