When using active dry yeast, always note the expiration date — expired yeast ... they typically carry fresh yeast. You may know this type of leavener by another name: sourdough. I don’t say natural ...

"Each type [of yeast] works differently, so choosing the right one can affect the texture and taste of your final product." ...

Wild-type S. boulardii has known probiotic properties ... BioPYMs are packed as dry yeast into capsules that, once swallowed, release the live yeast cells into the intestine, where they secrete ...