The function of liver protecting drugs is to promote the recovery of liver function. Therefore, it is applicable to patients whose liver has been damaged and whose liver function exceeds the normal range. For patients whose liver function is still within the normal range, liver protection drugs have no preventive effect, so it is best not to take them. Otherwise, it will increase the burden of the liver. There are three types of liver protective drugs with good clinical effects: vitamins, glycyrrhizin extracted from licorice, and silymarin. [Detailed]