What is a Liver Function Test (LFT)?
A Liver Function Test (LFT) is a simple blood test. It checks how well your liver is working. The test measures different proteins, enzymes, and substances in your blood. These results help doctors understand your liver’s health. According to the World Health Organization (WHO), LFTs are important for finding liver problems early.
Why is an LFT Performed?
Doctors use LFTs to check for liver damage or disease. Sometimes, they order this test if you have symptoms of liver problems. Other times, they use it to monitor ongoing liver conditions. In addition, LFTs help track how well treatments are working. If you take medicines that can affect the liver, your doctor may suggest regular LFTs.
Common Symptoms and Reasons for LFT
There are many reasons why your doctor may order a liver function test. Some common symptoms and situations include:
For example, if you have hepatitis or fatty liver, your doctor may check your LFT often.
How is an LFT Done? (Procedure and Preparation)
The LFT procedure is quick and simple. First, a healthcare worker takes a small blood sample from your arm. Usually, you do not need to fast before the test. However, your doctor may ask you to avoid certain foods or medicines. Always follow your doctor’s instructions. The blood sample goes to a lab for testing. Results are often ready within a day or two.
Understanding LFT Results (Normal vs. Abnormal)
LFT results show levels of several substances. These include:
Each has a normal range. For example, the LFT normal range for ALT is usually 7-56 units per liter. Normal ranges can vary by lab. If your results are within the normal range, your liver is likely healthy. But, abnormal results may mean there is a problem.
What Do Abnormal LFT Results Mean?
Abnormal LFT results do not always mean you have liver disease. Sometimes, mild changes can happen due to medicines, infections, or even exercise. However, high levels of ALT or AST may show liver injury. High bilirubin can cause jaundice. Low albumin may mean your liver is not making enough protein. Because many things can affect LFT results, your doctor will look at your health history and symptoms before making a diagnosis. The Centers for Disease Control and Prevention (CDC) says further tests may be needed if your LFT is abnormal.
Next Steps and When to Consult a Doctor
If your LFT results are abnormal, do not panic. Instead, talk to your doctor. They may repeat the test or order more tests. Sometimes, they may refer you to a liver specialist. Always seek medical advice if you have symptoms like yellow skin, severe pain, or confusion. Early treatment can prevent serious liver problems.
Prevention and Liver Health Tips
Keeping your liver healthy is important. Here are some simple liver health tips:
By following these tips, you can help protect your liver.
Conclusion
Liver Function Tests (LFTs) are important for checking liver health. They help find problems early and guide treatment. If you have symptoms or risk factors, talk to your doctor about getting an LFT. Consult a healthcare professional for personalized advice about your liver health.
