✍️ Written by the MedTestBD Editorial Team · Last reviewed: June 2026
What is a Liver Function Test (LFT)?
A Liver Function Test (LFT) — also called a liver panel or hepatic function panel — is a group of blood tests that together assess the health and functioning of the liver. Rather than a single measurement, LFT combines several enzymes, proteins, and bilirubin readings to give doctors a comprehensive picture of how well the liver is working and whether it is damaged or diseased.
The liver is involved in over 500 bodily functions — filtering toxins from blood, producing bile for digestion, synthesizing proteins, storing glycogen, and metabolizing medications. LFT helps detect problems early, often before symptoms become obvious.
What Does an LFT Report Include?
- SGPT (ALT — Alanine Aminotransferase) — the most liver-specific enzyme. Elevated levels indicate active liver cell damage from hepatitis, fatty liver, or medication toxicity. See: SGPT test price.
- SGOT (AST — Aspartate Aminotransferase) — found in liver and heart muscle. Raised in liver disease, but also in heart attacks and muscle injury.
- Alkaline Phosphatase (ALP) — elevated in bile duct obstruction, gallstones, or bone disease.
- GGT (Gamma-Glutamyl Transferase) — sensitive marker of alcohol-related liver damage and bile duct problems.
- Total Bilirubin — a breakdown product of red blood cells processed by the liver. High levels cause jaundice (yellowing of skin and eyes).
- Direct Bilirubin — helps distinguish between liver disease and bile duct blockage as the cause of jaundice.
- Total Protein — measures the liver's ability to produce proteins.
- Albumin — the main protein made by the liver. Low albumin suggests chronic liver disease or malnutrition.
- Globulin — elevated in autoimmune liver disease and chronic infections.
Normal LFT Values (Adults)
- SGPT (ALT): 7–56 U/L (men), 7–45 U/L (women)
- SGOT (AST): 10–40 U/L
- ALP: 44–147 U/L
- GGT: 9–48 U/L
- Total Bilirubin: 0.2–1.2 mg/dL
- Albumin: 3.5–5.0 g/dL
- Total Protein: 6.3–8.2 g/dL
Reference ranges vary slightly between laboratories. Always interpret results with your doctor — a mildly abnormal value in isolation may not be clinically significant.
When Should You Get an LFT?
- Jaundice — yellowing of the eyes or skin.
- Dark urine or pale stools.
- Upper right abdominal pain or swelling.
- Unexplained nausea, vomiting, or loss of appetite.
- Monitoring known hepatitis B or C infection.
- Before and during long-term medication use (statins, anti-TB drugs, paracetamol-based medicines).
- Routine checkup for people with diabetes, obesity, or a family history of liver disease.
- Suspected fatty liver (NAFLD) — increasingly common in Bangladesh due to dietary habits.
How to Prepare for LFT
Fasting for 8–12 hours is generally recommended before an LFT, as fatty meals can temporarily affect some enzyme levels. Water is permitted. Take the blood sample in the morning before breakfast for most consistent results. Inform your doctor of all medications, herbal supplements, and alcohol consumption before the test.
LFT Price in Bangladesh
Because LFT is a panel of multiple tests run together, it costs more than a single blood test but provides far more information per taka spent. Prices vary considerably between government and private labs. Compare LFT prices across diagnostic centers on MedTestBD to find the best-value option near you.
⚠️ This information is for general reference only. Always consult a qualified physician before undergoing any medical test.
