Yeast  beta glucan is a polysaccharide that exists in the cell wall of yeast and has immune enhancing activity—— Beta- Glucan. Beta- Glucan is widely present in various fungi and plants, such as Agaricus blazei, shiitake mushrooms, Ganoderma lucidum, and oats, and is their main functional substance for exerting health benefits. Yeast beta glucan has stronger immune enhancing activity and has the effects of improving blood lipids, clearing toxins, resisting radiation, repairing cells, and improving intestinal function.