Liver Function Test – Everything You want to Know About Liver Function Test (detailed guide 2023)


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Liver function test normal range is done to check the different component levels present in the liver. The results of such tests support doctors to prepare the level chart to check liver enzymes or to check the presence of any diseases. Let’s read more about it!

The test result of Liver Function Test (LFT) normal range can be used as a factor to ensure your liver health.  It also helps in screening any chronic diseases.  By testing the level of enzyme as compared to  the liver function test normal range, medical experts can screen diseases like hepatitis and other liver diseases.

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Why is it Recommended by Doctors to Get a Liver Function Test Done?

Doctors recommend a LFT test normal range to check the liver enzymes level chart normal range to track any diseases. This test reveals the components in the liver that may guard or harm it.

Below are some situations under which doctors recommend liver function test:

  • In case the person is suffering from hepatitis B or C to track the harm done to your liver
  • In case of alcoholic patient to track the side effects done by large consumption of alcohol
  • In case of gallbladder to check the working of the liver
  • To watch the result of some medicines with strong fallouts.
  • To track progress in case of pre-existing liver diseases
  • In case of family history of liver diseases, to check for any disorder of your liver
  • In case the patient suffers from conditions like anemia, diabetes, high BP etc.

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What Do You Mean by Liver Function Test Normal Range?

The LFT normal values show ALT between 7 to 55 units per liter (U/L). If the range shown in the result is beyond this, the ALT may not be in the normal range. So, when the normal range of your liver functions tests are above or below the prescribed range, it may be a cause of concern.

Below are the normal liver function test prescribed by doctor to check your liver health:

Alanine Transaminase (ALT) –  For females, the ALT value should be 25 units per liter and for males it should be 33 units per litre as shown in the liver functions test normal values. So, if the ALT levels are more than the liver function test normal range, it might get released into the blood.

Aspartate Aminotransferase (AST) –  The liver function test normal range chart for AST levels should be 36 units per liter for adults and slightly high in children and teenagers.  These are again very important and are available in different body parts such as liver, heart, pancreas, brain, muscles etc. In case of liver damage, the levels of AST may not show LFT normal range.

Alkaline Phosphatase (ALP) – For ALP, the liver function test normal range has to be within 20 to 140 units per liter. These are also essential enzymes thriving in the liver as well as bones and bile ducts. By maintaining the ALP level in blood the bile duct can be managed.

Albumin Test – For albumin, the liver function test normal range goes from 35-50 grams per litre. The liver creates this component to control the tissue nourishment, for hormone transport, etc. It is an important protein and getting an albumin test one can track the way the liver creates this protein.

Bilirubin Test – Bilirubin liver function tests normal range should be between 0.1 to 1.2 milligrams per deciliter. This is a waste byproduct that goes through your liver before getting out of the body via stool.  This is created by breaking the RBCs down.

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How to Prepare for Liver Function Test?

To prepare for a liver function test to understand the availability of liver enzymes in your blood, you can take the following steps as prescribed by doctors:

  • Stay away from certain food items which can influence the enzyme level of your blood and enhance the body’s normal AST levels
  • Stop taking certain medicines as per your physician’s instructions some hours/days before taking the test
  • Stay empty stomach for a few hours before the test is conducted
  • Drink water as per the doctor’s recommendation before the test

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Once the test is conducted you will come to know about the range of your liver function test. If your liver enzyme test shows little above or below the normal range, it may not be a serious cause of concern. However, if there is a huge deviation in the range, it may indicate damage to the liver.

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FAQs on Liver Function Test

What preparation is required for a liver function test?

To prepare for a liver function test, the doctor may ask you to stay on an empty stomach for 8 to 12 hours. So, you may not be allowed to eat or drink before undergoing the test. If you are already under any medication, you must inform them about that, else it may affect the test results.

Is drinking water allowed before undergoing a liver function test?

You may not be allowed to eat or drink anything before the test is performed. So, you will have to fast for 10-12 hours prior to the test.

Is it possible to improve the liver function test results? If so, How?

Follow the below tips to keep your liver in good health:

Be mindful about your alcohol consumption
Eat right and Exercise regularly 
Include medications and herbs in your diet if needed
Make some dietary changes
Lose excess weight 

How often should a liver function test be performed?

In case you spot any abnormal symptoms, it is suggested to go for a liver function test.  However, there are no particular guidelines about the frequency of performing this test as well as about the age at which to start performing the tests. It depends on your health and the result of your test. If there are any abnormalities in your liver function test, you might have to repeat it in a few months as prescribed by your doctor. 

Can a liver function test result vary?

The levels of liver function tests may vary between normal and abnormal if you are having any liver disease. Liver tests support the doctor to prepare a treatment plan. 

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Feb 16, 2023
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PayBima is an Indian insurance aggregator on a mission to make insurance simple for people. PayBima is the Digital arm of the already established and trusted Mahindra Insurance Brokers Ltd., a reputed name in the insurance broking industry with 17 years of experience. PayBima promises you the easy-to-access online platform to buy insurance policies, and also extend their unrelented assistance with all your policy related queries and services.

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