Saccharomyces Boulardii is a non-colonising, non-pathogenic probiotic yeast. It is popular amongst travellers and does not need refrigeration. Although a yeast, many people that normally avoid yeast based products do not experience a negative reaction to taking saccharomyces. Each capsule provides 250mg or 5,000,000,000 CFU. Note: This product is not intended to diagnose, treat, cure, or prevent any disease, nor should supplements be used as a substitute for a balanced diet. Not intended for pregnant/breastfeeding mothers or children under 18. Do not exceed the recommended dose.