The eleven liver functions are generally referred to as the full liver function. The cost of a full liver function test result is usually around$80-$150. Depending on the geographical location of the patient and the level of the hospital, the fee may fluctuate up and down. If patients take blood test for liver function, it is recommended that they wake up in the morning on an empty stomach and take the blood test without drinking or eating. The liver function test is more accurate and can reflect the health of the liver in a more comprehensive and correct way. Patients also need to fast for the physical examination, because some patients may need to check the color ultrasound of the upper abdomen. For the ultrasound of the upper abdomen, if you look inside the gallbladder, it is also necessary for the patient to fast, without eating or drinking. Drinking or eating will cause the gallbladder to contract, which will further cause the gallbladder to become empty, and the ultrasound will not be able to see what is going on inside the gallbladder. This does not allow for a correct diagnosis of whether there are stones or polyps in the gallbladder.