What are the normal values for the three liver function tests?
May 10, 2023
Source: Cainiu Health
Dr. Jiang Weimin
Introduction
The normal values for the three liver function tests are as follows: the normal range for alanine aminotransferase (ALT) is 0–40 U/L, and for aspartate aminotransferase (AST) it is typically 0–40 U/L. The normal levels of gamma-glutamyl transferase (GGT) are usually 11–50 U/L in males and 7–32 U/L in females. Abnormally elevated values of these indicators can assist in the diagnosis of space-occupying liver diseases, hepatic parenchymal damage, and other conditions.
The normal values for the three liver function tests are generally determined according to the specific items being tested, typically 0–40 U/L, 0–40 U/L, and 11–50 U/L or 7–32 U/L. The details are as follows:
1. 0–40 U/L
The three liver function tests usually include alanine aminotransferase (ALT), aspartate aminotransferase (AST), and gamma-glutamyl transferase (GGT). The normal value for ALT is 0–40 U/L. If the level exceeds 2.5 times the upper limit of the reference range and remains elevated for more than half a month, a diagnosis of hepatitis may be made.
2. 0–40 U/L
The normal range for AST is typically 0–40 U/L. If AST levels exceed this range and remain higher than ALT over time, it suggests that liver inflammation is becoming chronic and progressive.
3. 11–50 U/L or 7–32 U/L
Normal GGT levels are generally 11–50 U/L in males and 7–32 U/L in females. Significantly elevated GGT levels can help diagnose space-occupying liver diseases or parenchymal liver damage.
If liver disease is detected through examination, it is recommended to actively seek treatment under a doctor's guidance to prevent disease progression and adverse effects on health.
