Liver function tests are blood tests that check how well your liver works. These tests measure different proteins, enzymes, and substances in your blood. Because the liver plays a key role in your health, these tests help doctors spot problems early. In fact, many people call them a “liver health check” or “liver blood test.”
Common Types of Liver Function Tests
Doctors use several tests to check your liver. Each test looks at a different part of liver health. Here are the most common types:
Alanine transaminase (ALT): High ALT levels may mean liver damage.
Aspartate transaminase (AST): This enzyme also rises with liver injury.
Alkaline phosphatase (ALP): High ALP can signal bile duct or liver problems.
Bilirubin: This substance forms when red blood cells break down. High levels may cause yellow skin or eyes.
Albumin: This protein is made by the liver. Low albumin can mean liver disease.
Total protein: This test checks all proteins in your blood, including albumin.
Why Are Liver Function Tests Important?
Liver function tests help doctors find liver problems early. For example, they can spot hepatitis, fatty liver, or damage from alcohol. Early detection means you can start treatment sooner. Also, these tests help track how well treatments are working. According to the CDC, regular liver health checks can prevent serious illness.
Symptoms or Reasons to Get Tested
Sometimes, you may not feel sick, but your doctor may still suggest a liver blood test. However, certain symptoms or risk factors make testing more important. You should consider a liver function test if you have:
- Yellow skin or eyes (jaundice)
- Dark urine or pale stool
- Swelling in your belly or legs
- Unusual tiredness
- Loss of appetite
- Family history of liver disease
- Heavy alcohol use
- Exposure to hepatitis viruses
How Liver Function Tests Are Performed?
Getting a liver function test is simple. Here is what usually happens:
You visit a clinic or lab.
A nurse cleans your arm with alcohol.
They use a small needle to draw blood from your vein.
The blood goes to a lab for testing.
Your doctor reviews the liver test results and explains them to you.
Most people feel only a quick pinch during the blood draw. Afterward, you can return to your normal activities.
How to Prepare for a Liver Function Test?
In many cases, you do not need to do anything special before a liver blood test. However, your doctor may ask you to:
- Fast (not eat or drink) for several hours before the test
- Avoid certain medicines that could affect results
- Tell them about all supplements or herbs you take
Always follow your doctor’s instructions. This helps make sure your liver health check is accurate.
Understanding Your Results
After your test, your doctor will explain your liver test results. But what do high or low values mean? Here is a simple guide:
High ALT or AST: May mean liver injury or inflammation.
High ALP: Can point to bile duct or bone problems.
High bilirubin: May cause jaundice and signal liver or blood issues.
Low albumin: Can mean poor liver function or other health problems.
However, many things can affect your results. For example, some medicines or infections may change your numbers. Therefore, always talk to your doctor for a full explanation. They can help you understand what your results mean for your health.
Prevention and Lifestyle Tips for Liver Health
Keeping your liver healthy is important for your whole body. Here are some tips to protect your liver:
- Eat a balanced diet with plenty of fruits and vegetables
- Limit alcohol use
- Exercise regularly
- Avoid sharing needles or personal items
- Get vaccinated for hepatitis A and B if needed
- Take medicines only as prescribed
With these steps, you can lower your risk of liver disease and keep your liver working well.
Concerned about your liver health? Get a comprehensive liver function test at Q Diagnostics today! Our expert team provides accurate results and personalized guidance to help you stay healthy. Book your appointment now!
