Jarro-Dophilus Gut Calm combines the clinically documented probiotic yeast Saccharomyces boulardii with 3 patented probiotic strains clinically shown to calm the gut.* The strains support relief from occasional gas. bloating and discomfort from gut irregularity and lactose.* S. boulardii aids the integrity of the cells lining the gut. stimulates digestive enzyme production. and supports the growth of good bacteria while eliminating other bacteria.*