1. What is a Liver Function Test (LFT)?
A Liver Function Test, commonly called Liver Function Test, is a group of blood tests used to check how well the liver is working and to detect liver damage or disease.
2. Why is an LFT done?
Doctors may recommend an LFT to evaluate liver health, diagnose liver diseases, monitor ongoing treatment, or check the effects of medications on the liver.
3. What conditions can an LFT help detect?
LFTs may help detect conditions such as hepatitis, fatty liver disease, liver infection, jaundice, alcohol-related liver disease, and liver damage due to medications.
4. What are the common components of an LFT?
An LFT usually includes tests like ALT (SGPT), AST (SGOT), bilirubin, alkaline phosphatase (ALP), albumin, and total protein levels.
5. How is the test performed?
The test is performed by taking a small blood sample from a vein in the arm, usually in a laboratory or clinic.
6. Is fasting required before an LFT?
Yes, fasting for 8–12 hours may be recommended before a Liver Function Test, especially if other blood tests like a lipid profile are being done at the same time. Patients should avoid alcohol and fatty foods before the test unless advised otherwise by their doctor.
7. Can I drink water before the test?
Yes, plain water is usually allowed during the fasting period and may help make blood collection easier.
8. What do high liver enzyme levels mean?
High liver enzyme levels may indicate liver inflammation, infection, fatty liver, alcohol-related damage, or other liver disorders. Further evaluation may be required.
9. Can medications affect LFT results?
Yes, certain medicines, supplements, alcohol consumption, and even strenuous exercise can temporarily affect liver test results. Patients should inform their doctor about all medications they are taking.
10. Are Liver Function Tests painful or risky?
The procedure is generally safe and quick. Patients may feel mild discomfort during the blood draw, but serious complications are rare.