Understanding Liver Function Tests (LFT): Purpose, Procedure, and Results

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. Doctors use LFT blood tests to measure different chemicals and enzymes in your blood. These include liver enzymes like ALT and AST, as well as bilirubin. Each of these tells something important about your liver health. Because the liver has many jobs, these tests help spot problems early. For example, they can show if your liver is inflamed or damaged.

Why is an LFT Needed?

Often, doctors order an LFT to check for liver problems. Sometimes, you may have symptoms. Other times, it is part of a routine liver health check. Here are some common reasons for an LFT:

Yellowing of the skin or eyes (jaundice)

Stomach pain or swelling

Unexplained tiredness

Dark urine or pale stool

Monitoring side effects of medicines

Checking for liver infections, like hepatitis

Regular check-ups if you have liver disease

In addition, an LFT can help track how well treatment is working. It is also useful before surgery or as part of a health check-up.

How is an LFT Performed?

Getting an LFT is quick and easy. First, a healthcare worker cleans your arm. Then, they use a small needle to take a blood sample. The process usually takes less than five minutes. Afterward, your blood goes to a lab for testing. Most people feel only a small pinch. You can return to your normal activities right after the test. Sometimes, you may see “LFT testing near you” at clinics or hospitals.

What Do LFT Results Mean?

LFT results show levels of different substances in your blood. Each one tells something about your liver. Here are some key parts of the liver test results meaning:

ALT (Alanine aminotransferase): High levels may mean liver damage.

AST (Aspartate aminotransferase): This enzyme also rises with liver injury.

ALP (Alkaline phosphatase): High values can point to blocked bile ducts.

Bilirubin: High bilirubin can cause yellow skin and may mean liver or bile problems.

Albumin: Low albumin may show poor liver function.

However, not all abnormal results mean serious disease. Sometimes, mild changes are temporary. Your doctor will explain your results and what they mean for your liver health.

Common Causes of Abnormal LFT Results

There are many reasons why LFT results may be abnormal. Some common causes include:

Viral infections like hepatitis

Fatty liver disease

Alcohol use

Certain medicines

Obesity

Gallbladder problems

Autoimmune liver diseases

But sometimes, even healthy people can have mild changes. Therefore, it is important to talk to your doctor about your results.

How to Prepare for an LFT

Preparing for an LFT is simple. In most cases, you do not need to do anything special. However, your doctor may give you some instructions. Here are some tips:

Ask if you need to fast (not eat) before the test

Tell your doctor about all medicines and supplements you take

Drink water to stay hydrated

Wear a short-sleeved shirt for easy access to your arm

Always follow your doctor’s advice for the best results.

Frequently Asked Questions about LFT

Is the LFT blood test painful? Most people feel only a small pinch.

How long do LFT results take? Results are often ready in one to two days.

Can I eat before an LFT? Usually yes, but check with your doctor.

What if my LFT is abnormal? Your doctor will explain what the results mean and what to do next.

When to Consult a Doctor

“If you have symptoms like yellow skin, stomach pain, or dark urine, see a doctor soon. Also, if your LFT results are abnormal, do not panic. Instead, talk to your healthcare provider. They can guide you on the next steps. Early advice can help protect your liver health.

In summary, a Liver Function Test (LFT) is a simple way to check your liver’s health. If you have questions or concerns about your LFT results, consult a healthcare professional at Gokulam Clinic & Scans for personalized advice about your liver health or LFT results.”