About this item Balance Your Gut. Widely used for its reputed ability to help repopulate the gut with good bacteria, saccharomyces boulardii, also known as S. boulardii, is the probiotic of choice. Survives Stomach Acid. S. boulardii is an acid resistant microorganism, meaning its not altered or destroyed by stomach acid. Formulated to give you the full effect of 8 billion CFUs, youll be well on your way to healthy digestion and gut flora. Shelf Stable, Travel Ready. Most probiotics require refrigeration to stay potent. The saccharomyces boulardii probiotic is different. Because its a yeast microbe, it's resistant to temperature and pH changes making it the perfect, go anywhere probiotic. Your Foundation Of Wellness. It all starts in the gut. Research suggests that a healthy gut promotes the overall health of your brain and body. One of the most well-researched probiotics available, S. boulardii can be your key to health and wellness. What Sets Us Apart? At Zhou, we use only the highest-quality ingredients in a facility following GMP (good manufacturing practices). Plus, we test everything at our lab in Utah, so you can be confident that you're fueling your body with the very best. During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.