What is LFT? | When Should You Get a Liver Function Test?
LFT (Liver Function Test) is an important group of blood tests used to evaluate the health and function of the liver. These tests can help doctors identify signs of liver cell injury, inflammation, problems with bile flow, or changes in certain proteins produced by the liver.
The liver performs several essential functions, including processing nutrients, producing important proteins, metabolizing medicines and other substances, and producing bile. Therefore, doctors may recommend an LFT when liver-related symptoms or certain risk factors are present.
What is an LFT?
LFT (Liver Function Test) is not a single test. It is a panel of blood tests that measures different substances related to liver health.
Different LFT parameters can provide information about liver cells, bile flow and protein production.
An LFT alone cannot diagnose every type of liver disease. Doctors interpret the results along with your symptoms, medical history, physical examination and, when necessary, imaging tests such as an ultrasound.
What Tests Are Included in an LFT?
The exact LFT panel may vary between laboratories. Commonly measured parameters include:
1. ALT (SGPT)
ALT is an enzyme found mainly in liver cells. Increased ALT levels can occur when liver cells are injured.
2. AST (SGOT)
AST is another enzyme associated with liver cells, but it is also found in other tissues. Therefore, an increased AST does not always indicate liver disease.
3. Bilirubin
Bilirubin is produced during the breakdown of red blood cells. Increased bilirubin levels can sometimes cause yellowing of the skin or eyes, known as jaundice.
4. Alkaline Phosphatase (ALP)
ALP is an enzyme found in the liver, bile ducts and bones. Increased levels may occur with certain liver or bile duct conditions.
5. Albumin
Albumin is an important protein produced by the liver. Its level can also be affected by conditions other than liver disease.
6. Total Protein
This measures the total amount of proteins present in the blood.
7. Globulin
Globulins are a group of blood proteins. Some LFT panels may report globulin or the albumin/globulin ratio.
When Should You Get an LFT?
A doctor may recommend an LFT if you have:
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Yellowing of the skin or eyes
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Dark-coloured urine
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Persistent tiredness
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Loss of appetite
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Nausea or vomiting
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Discomfort or pain in the upper right side of the abdomen
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Suspected liver disease
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Suspected hepatitis
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Fatty liver evaluation
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Long-term use of certain medicines
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Possible alcohol-related liver problems
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A previously diagnosed liver condition requiring monitoring
An LFT may also be included in certain health evaluations even when a person does not have obvious symptoms.
Common Symptoms of Liver Problems
Liver-related conditions can cause different symptoms. Possible symptoms include:
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Persistent fatigue
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Loss of appetite
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Nausea
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Vomiting
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Abdominal discomfort
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Yellowing of the skin or eyes
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Dark urine
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Pale-coloured stools
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Itching
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Swelling in the legs or abdomen
Important: These symptoms can also occur due to many other conditions. Do not diagnose liver disease based on symptoms alone.
Do You Need to Fast for an LFT?
Fasting is not always required for an LFT.
However, if your LFT is being done together with tests such as Lipid Profile or Fasting Blood Sugar, fasting may be required because of those other tests.
Always confirm the preparation instructions with your doctor or diagnostic laboratory before the test.
How to Understand an LFT Report
An LFT report usually shows the test result along with the laboratory's reference range.
| Parameter | What It May Indicate |
| ALT / SGPT | Liver cell injury |
| AST / SGOT | Liver or other tissue injury |
| Bilirubin | Bilirubin processing and excretion |
| ALP | Bile duct or other conditions |
| Albumin | Protein production and other health factors |
| Total Protein | Total blood protein level |
An isolated abnormal result does not necessarily mean that you have serious liver disease.
Also, reference ranges can vary between laboratories, so your result should be compared with the reference range printed on your report.
What Can Cause Abnormal LFT Results?
Changes in liver enzymes or other LFT parameters can occur due to several reasons, including:
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Fatty liver
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Viral hepatitis
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Alcohol-related liver injury
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Effects of certain medicines
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Bile duct obstruction
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Some infections
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Other liver or metabolic conditions
Sometimes temporary changes can also occur. If your LFT is abnormal, your doctor may recommend repeat testing or additional evaluation.
Fatty Liver and LFT
Some people with Fatty Liver may have increased ALT or AST levels. However, normal liver enzymes do not completely rule out fatty liver.
Doctors may evaluate fatty liver using a combination of medical history, blood tests and imaging such as an ultrasound, when appropriate.
LFT and Hepatitis
Hepatitis refers to inflammation of the liver. It can occur due to viral infections as well as other causes.
LFT abnormalities may occur with hepatitis, but an LFT alone cannot determine the specific type or cause of hepatitis.
If required, doctors may recommend additional hepatitis-specific blood tests.
How to Keep Your Liver Healthy
Some general lifestyle measures can support overall liver health:
🥗 Eat a Balanced Diet
Include vegetables, fruits, whole grains and appropriate sources of protein as part of a balanced diet.
🏃 Stay Physically Active
Regular physical activity and maintaining a healthy weight can support metabolic and liver health.
🍺 Avoid or Limit Alcohol
Excessive alcohol consumption can damage the liver.
💊 Use Medicines Responsibly
Do not take medicines or supplements without appropriate medical advice. Some medicines and supplements can affect the liver.
🩺 Get Appropriate Health Checkups
If you have risk factors or your doctor recommends testing, undergo the necessary blood tests and imaging.
How Should You Prepare for an LFT?
Routine LFT usually does not require special fasting. However:
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Follow the instructions provided by your doctor or laboratory.
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Inform your doctor about medicines and supplements you take.
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Do not stop prescribed medicines on your own.
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If other blood tests are being performed at the same time, check whether fasting is required.
How Long Does an LFT Take?
Blood sample collection generally takes only a few minutes.
The time required to receive the report depends on the laboratory, test panel and processing requirements.
Where Can You Get an LFT in Mira Road?
If you are looking for a Liver Function Test in Mira Road, MOTI Diagnostics Centre provides LFT and other pathology testing services.
Available Services Include:
✔ Liver Function Test (LFT)
✔ Routine Blood Tests
✔ Diabetes Tests
✔ Thyroid Tests
✔ Vitamin Tests
✔ CBC & Other Pathology Tests
✔ Home Blood Collection
✔ Timely Laboratory Reports
Home Collection availability and any test-specific preparation requirements should be confirmed before booking.
Benefits of an LFT
An LFT can help doctors:
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Evaluate liver-related abnormalities
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Assess liver enzymes and bilirubin levels
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Evaluate certain liver and bile-related conditions
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Monitor some patients with known liver conditions
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Decide whether additional tests may be needed
What Should You Do If Your LFT Is Abnormal?
If one or more LFT values are outside the laboratory reference range, do not panic.
Your doctor may consider:
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Your symptoms
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Medical history
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Medicines and supplements
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Alcohol consumption
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Other blood test results
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Ultrasound or other imaging, if required
Depending on the situation, your doctor may recommend repeat LFT or additional tests.
When Should You Seek Medical Attention?
Seek prompt medical attention if you develop symptoms such as yellowing of the skin or eyes, severe abdominal pain, persistent vomiting, unusual bleeding, confusion or severe weakness.
Conclusion
LFT (Liver Function Test) is an important group of blood tests used to evaluate liver health. Parameters such as ALT, AST, bilirubin, ALP, albumin and total protein can provide useful information about liver cells, bile flow and protein levels.
An abnormal LFT result does not automatically mean that you have serious liver disease. Your report should always be interpreted in the context of your symptoms, medical history and the laboratory's reference ranges.
If your doctor recommends an LFT, timely testing and appropriate medical follow-up can help identify potential problems and determine whether further evaluation is required.
Frequently Asked Questions (FAQ)
1. What is an LFT?
LFT stands for Liver Function Test. It is a group of blood tests used to evaluate different aspects of liver health.
2. What tests are included in an LFT?
Common parameters include ALT/SGPT, AST/SGOT, bilirubin, ALP, albumin and total protein. The exact panel can vary between laboratories.
3. Is fasting required for an LFT?
Usually, fasting is not required for an LFT alone. However, fasting may be necessary if other tests requiring fasting are performed at the same time.
4. Does an abnormal LFT mean the liver is damaged?
Not necessarily. LFT values can change for several reasons. A doctor should interpret the results based on the complete clinical picture.
5. Can Fatty Liver cause abnormal LFT results?
Yes, some people with fatty liver may have elevated liver enzymes. However, normal liver enzymes do not completely rule out fatty liver.
6. How often should an LFT be done?
There is no single testing schedule for everyone. The frequency depends on your health condition, risk factors and your doctor's advice.
7. Does a normal LFT mean the liver is completely healthy?
Not necessarily. A normal LFT is reassuring, but it cannot rule out every liver condition. Additional tests or imaging may be recommended when clinically appropriate.
Medical Disclaimer
This article is for educational purposes only and should not replace professional medical advice. For interpretation of your LFT report, further testing and treatment decisions, consult a qualified healthcare professional.
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