LFT Test normal Range

What is the LFT Test normal Range/Value?

LFT Test normal range – A (LFT) liver function test, also called a hepatic function panel, is a blood test that measures the levels of enzymes and proteins excreted by your liver. While some of these tests measure how well the liver performs its normal functions, others measure enzymes that liver cells release during damage or disease.

LFTs test help diagnose and monitor liver disease or damage. If the levels are higher or lower than the normal range values, it indicates that a person’s liver is not functioning optimally.

Alanine transaminase (ALT)

ALT is an enzyme found in liver cells that helps convert proteins into energy. The normal range is from 7 to 55 units per liter (U/L). During liver infection, inflammation, or any other form of damage, hepatic cells release increased quantities of ALT into the bloodstream.


Red blood cell lysis produces bilirubin as a waste product. The liver typically processes it. Before being eliminated by your stools, it first goes through the liver. Bilirubin is a compound produced during the physiological breakdown of red blood cells. Bilirubin levels in the blood usually range from 0.1 to 1.2 mg/dL. Elevated bilirubin levels (jaundice) may indicate liver damage or disease or certain types of anemia.

Albumin and total protein

Proteins are vital in the body for a host of functions, including immunity. Albumin is one such protein. Albumin levels in the blood usually range from 3.5 to 5.0 grams per deciliter (g/dL), and total proteins from 6.3 to 7.9 g/dL. When albumin levels and total protein are lower than normal, it may indicate liver damage or disease.

Alkaline phosphatase (ALP)

You can find the enzyme alkaline phosphatase (ALP) in your liver, bile ducts, and bones. Usually, an ALP test is requested along with a number of additional assays. An ALP test can be performed to assess the liver’s bile duct system.  ALP levels typically range from 40 to 129 U/L. Levels of ALP beyond this range may indicate liver damage or diseases, such as a blocked bile duct or certain bone diseases.

L-lactate dehydrogenase (LDH)

LDH is an enzyme found in the liver. Elevated levels may indicate liver damage. However, its levels can be high in other clinical conditions as well. The normal range for LDH levels in the blood is 122 to 222 U/L.

Prothrombin time (PT)

PT measures the time it takes for your blood to clot and ranges from 9.4 to 12.5 seconds. When PT is higher than this normal range, it may indicate liver damage, but its levels can also increase if you’re taking anticoagulants (blood-thinning drugs), such as warfarin.

Gamma-glutamyltransferase (GGT)

GGT is a liver enzyme. In blood, its levels generally range between 8 to 61 U/L. The presence of GGT levels beyond this range may indicate liver or bile duct damage.

Aspartate transaminase (AST)

The enzyme AST helps metabolize amino acids. Like ALT, AST usually is present in blood at low levels. Average values range from 8 to 48 U/L. When liver damage sets in, AST levels rise in the blood.

A Chart of LFT Test normal Range/Value

LFT Test Normal Range


ALT normal Value/Range is 7 to 55 units per liter (U/L) and ALT High level is 55 units per litre (U/L)

ALT normal Value/Range is 7 to 55 units per liter (U/L).

AST normal value/Range is 8 to 48 U/L. Results may be different because Some labs use different measurements or may test different samples.

ALP normal Value/Range is 40 to 129 U/L. Normal values may vary different from laboratory to laboratory. Normal range also different with age and gender. High levels of ALP are normally seen in children undergoing growth spurts and in pregnant women.