Bioactive constituents and action mechanism of Xiaoyao San for treatment of non-alcoholic fatty liver disease.

Xiaoyao San (XYS) is a classic Chinese medicine prescription. It is traditionally used to relieve syndrome of "liver stagnation and spleen deficiency", a common syndrome type in traditional Chinese medicine, through soothing liver, tonifying spleen, and nourishing blood. Correspondingly, XYS has long application in the treatment of depression, dyspepsia and liver diseases. Given the rising of cutting-edge researches on XYS, there's a significant need to diligently uncover the bioactive constituents and action mechanisms of XYS for treating non-alcoholic fatty liver disease accordingly.