Is fasting required for a blood test to check liver function?

Generally, blood tests for liver function require fasting. The detailed analysis is as follows:

Fasting means refraining from consuming any food and beverages (including water) for a period before the test. Components in food, especially high-fat, high-cholesterol, and greasy foods, can affect the chemical composition of blood and thereby interfere with the accuracy of liver function indicators. For example, after consuming greasy foods, fats are digested and absorbed in the small intestine and enter the bloodstream, causing turbid blood due to fat particles (lipemia), which can affect test results. Additionally, unhealthy habits such as alcohol consumption, eating spicy foods, and staying up late may also lead to abnormal liver function indicators.

In daily life, maintaining healthy eating habits, avoiding high-fat, high-cholesterol, and greasy foods, and reducing the burden on the liver is recommended. At the same time, consuming an appropriate amount of food rich in high-quality protein, vitamins, and minerals can help maintain normal liver function.