When you hear the word "probiotic", the name by itself implies bacteria. Good bacteria in our small and large intestine is important to our GI health. But, there is also a lesser known yeast that can also populate the gut and have similar beneficial properties. It's called Saccharomyces boulardii. It's a non-pathogenic yeast that can be particularly beneficial for our gut health. I often use it with clients who are taking antibiotics. Because Saccharomyces boulardii is a yeast and not a bacteria, antibiotics have no effect on it. It can help prevent antibiotic-associated diarrhea. In those individuals who have diarrhea-dominant IBS or acute diarrhea, this yeast can be particularly helpful for decreasing the frequency of loose stools. Human studies have also found that it can reduce Clostridium difficile diarrhea.