Q. What is the normal range for liver function tests?
Doctor Answer is medically reviewed by SecondMedic medical review team.
Liver function tests, often abbreviated as LFTs, are a group of blood tests that help assess the health and functionality of your liver. These tests are crucial in diagnosing liver diseases and monitoring their progression. Now, let's dive into what's considered a normal range for these tests.
1. Total Protein: This measures the total amount of protein in your blood, including albumin and globulin. The normal range for total protein is usually between 6.0 to 8.3 grams per deciliter (g/dL).
2. Albumin: Albumin is a protein made by the liver. It helps maintain fluid balance in your body. The normal range for albumin is typically between 3.4 to 5.4 g/dL.
3. Bilirubin: Bilirubin is a waste product produced by the liver when it breaks down old red blood cells. There are two types: direct (conjugated) and indirect (unconjugated). The total bilirubin level should typically be below 1.2 mg/dL, with direct bilirubin usually less than 0.3 mg/dL and indirect bilirubin usually less than 0.9 mg/dL.
4. Alanine Aminotransferase (ALT): ALT is an enzyme found mainly in the liver. Elevated levels can indicate liver damage or inflammation. The normal range for ALT is generally between 7 to 56 units per liter (U/L) for males and 5 to 36 U/L for females.
5. Aspartate Aminotransferase (AST): Like ALT, AST is an enzyme found in the liver but also in other organs like the heart and muscles. Elevated AST levels can indicate liver damage or injury. The normal range for AST is usually between 8 to 48 U/L for males and 7 to 34 U/L for females.
6. Alkaline Phosphatase (ALP): ALP is an enzyme found in the liver, bile ducts, and bones. Elevated levels can indicate liver or bone disease. The normal range for ALP is typically between 44 to 147 U/L, but this can vary depending on age and other factors.
Remember, these ranges can vary slightly depending on the laboratory and the specific testing methods used. If your liver function test results fall outside of the normal range, it's essential to consult with your healthcare provider for further evaluation and guidance.
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