Liver Function Tests (LFT): What Do Your Results Say?

Posted on May 20, 2025 by Lab Decoded

🔬 What is a Liver Function Test (LFT)?

A Liver Function Test (LFT) is a group of blood tests that give valuable insights into your liver’s health. These tests measure enzymes, proteins, and bilirubin levels in your blood. Abnormal values can signal liver disease, bile duct obstruction, alcohol-related damage, or even viral infections like hepatitis.

📊 Common Parameters in an LFT Panel

Test Name	Normal Range	What It Indicates
ALT (SGPT)	7–56 U/L	Liver cell damage, hepatitis
AST (SGOT)	10–40 U/L	Liver and heart cell injury
ALP (Alkaline Phosphatase)	44–147 IU/L	Bile duct obstruction, bone disease
Total Bilirubin	0.1–1.2 mg/dL	Jaundice, liver function
Direct Bilirubin	0.0–0.3 mg/dL	Hepatic excretion issues
Total Protein	6.3–7.9 g/dL	Nutritional status, liver synthesis
Albumin	3.5–5.0 g/dL	Liver’s protein-making ability
Globulin	2.0–3.5 g/dL	Immunity and protein balance
A/G Ratio (Albumin/Globulin)	0.8–2.0	Protein imbalance

⚠️ What If My LFT Values Are Abnormal?

Abnormal LFT values don't always mean you have liver disease. Some temporary factors like medication, alcohol intake, or fatty food can also affect these readings. Persistent elevation, however, may indicate:

Fatty Liver (NAFLD)
Hepatitis A, B, or C
Cirrhosis or liver fibrosis
Gallbladder or bile duct obstruction
Drug-induced liver injury

🩺 When Should You Get LFT Done?

You should consider an LFT if you have:

Fatigue or weakness
Yellowing of eyes or skin (jaundice)
Dark-colored urine
Right upper abdominal pain
History of alcohol or medication use
Routine health check-up

📝 Final Words

LFTs offer a window into your liver’s health. Always consult your doctor for interpreting test results in the context of your symptoms and medical history. Early diagnosis can help prevent complications like cirrhosis or liver failure.