Consuming certain cereals (barley, oats) and edible mushrooms decreases the levels of serum cholesterol and liver low-density lipoproteins, leading to lowering of atherosclerosis and cardiovascular disease hazards; this is also mediated by β-glucans.[14] These cereals, mushrooms, and yeast facilitate bowel motility and can be used in amelioration of intestinal problems, particularly obstipation.[15][16] Indigestible β-glucans, forming a remarkable portion of these materials, are also able to modulate mucosal immunity of the intestinal tract