Liver Function Test (LFT)

Description

About Liver Function Test (LFT)

A Liver Function Test (LFT) is a group of blood tests used to assess liver health ... and detect liver diseases. These tests measure enzyme levels, proteins, and substances such as bilirubin in the blood. The liver plays a crucial role in detoxification, metabolism, and digestion, so an LFT helps diagnose conditions like hepatitis, fatty liver, cirrhosis, or liver damage due to alcohol, infections, or medications.

Preparations Before Liver Function Test (LFT)

Proper preparation ensures accurate test results. Here’s what you need to do before the test:

• Fasting Requirement – Some LFTs may require fasting for 8–12 hours before the test.
• Avoid Alcohol & Medications – Alcohol and certain medications can affect liver enzymes, so avoid them before testing.
• Hydration – Drink water to stay hydrated, but avoid sugary or caffeinated drinks.
• Inform Your Doctor – Share any medications, supplements, or medical conditions that may impact results.

What to Expect During the Procedure

LFT is a simple blood test that takes only a few minutes.

1. A healthcare professional cleans your arm with an antiseptic.
2. A small needle is inserted into a vein, usually in the arm, to collect a blood sample.
3. The sample is stored in a vial and sent to the lab for analysis.
4. The site is covered with a bandage, and you can resume normal activities immediately.

Why Doctors Recommend Liver Function Test (LFT)

Doctors suggest an LFT for various reasons, including:

• Routine Health Checkups – To monitor liver function as part of regular health screenings.
• Diagnosing Liver Diseases – Helps detect conditions such as hepatitis, fatty liver disease, and cirrhosis.
• Monitoring Liver Damage – To check the impact of alcohol, infections, or medications on liver health.
• Assessing Jaundice – If a patient has yellowing of the skin or eyes, an LFT can confirm liver-related issues.
• Before Surgeries or Medications – Some procedures or treatments require liver health evaluation before proceeding.

Understanding the Test Results

LFT results include multiple markers that help evaluate liver health. Here are the key parameters and their normal ranges:

Liver Function Test (LFT) Results During Special Conditions

Certain health conditions can alter LFT results:

• Pregnancy – Hormonal changes may slightly elevate liver enzymes.
• Obesity & Fatty Liver Disease – Can lead to abnormal ALT and AST levels.
• Viral Infections (Hepatitis A, B, C) – Cause significant enzyme elevations.
• Alcohol Consumption – Chronic drinking can raise ALT, AST, and GGT levels.
• Liver Cirrhosis – Can lead to both high and low enzyme levels, depending on severity.
• Autoimmune Liver Diseases – Conditions like autoimmune hepatitis can cause abnormal LFT readings.

How to Maintain a Healthy Liver Function

Taking care of your liver is essential for overall well-being. Follow these tips:

• Eat a Balanced Diet – Include leafy greens, whole grains, lean proteins, and healthy fats. Avoid processed foods and excessive sugar.
• Limit Alcohol Consumption – Reduce or avoid alcohol to prevent liver damage.
• Stay Hydrated – Drink plenty of water to flush toxins from your system.
• Exercise Regularly – Helps maintain a healthy weight and reduces the risk of fatty liver disease.
• Avoid Overuse of Medications – Certain painkillers and antibiotics can harm the liver when taken excessively.
• Get Vaccinated – Protect yourself from hepatitis A and B with vaccines.
• Regular Health Checkups – Periodic LFTs help detect any liver issues early.