Saccharomyces boulardii is a true probiotic yeast superstar. It has potent beneficial effects on your body, as listed below, without the risks associated with some other probiotics. It's not a yeast to be afraid of, unless you're allergic to yeast, of course. Precautions have to be taken if you have any type of catheter, port or IV, or are immune-compromised, but if that situation applies to you, then please check with your doctor before using any probiotics. - See more at: http://www.powerofprobiotics.com/Saccharomyces-boulardii.html#sthash.9DY60Fsh.dpuf