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Extended Liver Function Panel

Published: August 1, 2026Updated: August 1, 2026

A comprehensive blood test that evaluates how well your liver is working by measuring multiple enzymes, proteins, and substances produced by the liver.

Quick summary

["Measures liver enzymes (ALT, AST, ALP, GGT) to detect liver cell damage","Evaluates liver function through bilirubin and protein levels","Assesses liver's ability to produce clotting factors via PT/INR","Helps diagnose conditions like hepatitis, fatty liver, and cirrhosis","Often ordered when patients have symptoms of liver disease or are on medications that may affect the liver"]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 1, 2026Editorial policy

Key facts at a glance

Category
chemistry
Sample
serum
Container
red-top or SST
Fasting
true

What is this panel?

The Extended Liver Function Panel (LFT-Extended) is a comprehensive blood test that provides a detailed evaluation of your liver's health and function. Unlike a basic liver panel, this extended version includes additional tests that help healthcare providers get a more complete picture of how well your liver is working, including its ability to produce important proteins and clotting factors.

What tests are included?

  • ALT (Alanine Aminotransferase) - enzyme that helps detect liver cell injury
  • AST (Aspartate Aminotransferase) - enzyme found in liver and other tissues
  • ALP (Alkaline Phosphatase) - enzyme related to bile ducts and bone
  • GGT (Gamma-Glutamyl Transferase) - enzyme sensitive to liver disease and alcohol use
  • Total Bilirubin - measures liver's ability to process waste products
  • Direct Bilirubin - helps identify the cause of jaundice
  • Total Protein - evaluates overall protein production by the liver
  • Albumin - main protein made by the liver; indicates liver's synthetic function
  • PT/INR (Prothrombin Time/International Normalized Ratio) - assesses liver's ability to produce clotting factors

When is this panel needed?

Your healthcare provider may order this extended liver panel if you have symptoms of liver problems such as jaundice (yellowing of skin or eyes), abdominal pain or swelling, unexplained fatigue, dark urine, or nausea. It is also commonly ordered if you have risk factors for liver disease (such as heavy alcohol use, obesity, diabetes, or family history), are taking medications that may affect the liver, or need to monitor a known liver condition. This panel is particularly useful for comprehensively assessing liver health when basic tests show abnormalities or when more detailed information is needed.

How to prepare

Fasting for 8-12 hours before the test is typically recommended for the most accurate results, especially for triglyceride and glucose measurements that may be included. Avoid alcohol for at least 24 hours before testing. Inform your healthcare provider about all medications, supplements, and herbal remedies you are taking, as some can affect liver enzyme levels. Stay well-hydrated and follow any specific instructions provided by your doctor or the testing facility.

Frequently asked questions

What do elevated liver enzymes mean?
Elevated liver enzymes (ALT, AST, ALP, GGT) can indicate liver inflammation or damage. This can be caused by various conditions including viral hepatitis, fatty liver disease, alcohol abuse, certain medications, autoimmune conditions, or bile duct problems. However, a single abnormal result doesn't always mean you have a serious problem - your doctor will interpret the results in context of your symptoms and other findings.
Is this test dangerous?
No, this is a standard blood test with minimal risks. You may experience slight bruising, bleeding, or dizziness at the injection site, but these are usually temporary. The amount of blood taken is small (typically one to several tubes) and is generally well-tolerated.
How long does it take to get results?
Results are typically available within 1-3 days, though this may vary depending on the laboratory. Your healthcare provider will contact you with the results or discuss them at your follow-up appointment.
Do I need to fast before this test?
Yes, fasting for 8-12 hours is typically recommended for the most accurate results. You may drink water during the fasting period. If you have diabetes, consult your healthcare provider about whether you should take your regular medications or adjust your insulin before fasting.
Can medications affect my liver panel results?
Yes, many medications can affect liver enzyme levels. Common culprits include statins (cholesterol medications), certain antibiotics, non-steroidal anti-inflammatory drugs (NSAIDs), anticonvulsants, and some herbal supplements. Always inform your doctor about all medications and supplements you are taking before the test.
  1. 1
    Mayo Clinic - Liver function testsSource
  2. 2
    MedlinePlus - Liver Function TestsSource
  3. 3
    American Liver FoundationSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 1, 2026. · Read our editorial policy