Intestinal mucosa is the main interface between the internal environment and the outside world,and the first line of defense against intestinal antigens.The integrity of intestinal mucosal barrier function plays an important role in animal intestinal health and the normal physiological functions of the body.Ursolic acid is a class of pentacyclic triterpenoids derived from plants.It was found that ursolic acid can maintain intestinal ho⁃meostasis and body health by affecting intestinal epithelial barrier function,intestinal mucin expression,bac...