The liver function test is mainly a blood test, which generally includes 12 items including glutathione aminotransferase, glutathione aminotransferase, glutamyl transpeptidase, alkaline phosphatase, total bilirubin, globulin, albumin, total protein and other indicators, which can reflect the basic state of liver function in a comprehensive way. Clinically, a liver function test alone costs about 100 RMB, while a biochemical test costs about 300 RMB. Because the biochemical routine test includes not only liver function but also kidney function, electrolytes, glucose and other indicators, the test is more comprehensive. 1 day before the liver function test, after 12:00 pm, you should fast and abstain from water, and come to the hospital in the morning on an empty stomach.