Can I drink water before a liver function test?

Generally, a liver function test refers to a liver function examination. During a liver function test, patients are usually not advised to drink water. The detailed explanation is as follows:

Liver function tests mainly include examinations of indicators such as serum alanine aminotransferase (ALT), serum aspartate aminotransferase (AST), alkaline phosphatase (ALP), and gamma-glutamyl transferase (GGT). Typically, patients are required to avoid eating or drinking for 8-12 hours before the test to prevent dilution of the blood, which could affect the concentration of liver-related indicators in the blood and lead to inaccurate test results. Therefore, to ensure accurate test results, doctors usually recommend patients refrain from drinking water before undergoing a liver function test.

In daily life, it is important to appropriately adjust dietary habits, consuming light and nutritious foods while avoiding greasy, high-fat, and high-protein foods. This helps improve the accuracy of test results and reduce the risk of misdiagnosis or missed diagnosis.