Liver function tests are performed by various biochemical tests to measure various indicators related to liver function and metabolism to reflect the basic status of liver function. There are many precautions to take before the liver function test, if you do not pay attention to these matters, the test results will be inaccurate. 1, fasting test liver function test the day before dinner can not drink alcohol, do not eat high fat, high protein food. Do not eat after 9:00 pm. You should not eat breakfast or drink water on the day of the test. 2. Eat a light diet You should not eat too greasy, too spicy or stimulating food at night. Can not eat foods rich in carotene, lutein, such as rape, carrots, papaya, oranges, liver, milk, egg yolk, fish, kiwi, yellow corn, purple cabbage, etc. 3, prohibit strenuous activities The morning of the examination can not be physical exercise or strenuous exercise, should arrive at the hospital after a quiet rest 20 minutes before the blood test 4, avoid medication Before the liver function test, should pay attention to prohibit the taking of a certain this drug, because some drugs may affect the accuracy of liver function test. For example, taking drugs such as vitamin D and adipine can affect the determination of bilirubin, and taking drugs containing opioids can lead to an increase in transaminase activity, etc. 5.Ensure sufficient sleep Before liver function test, pay attention to ensure sufficient sleep, good sleep can ensure the correct test results, insufficient sleep will affect the transaminase results.