Unique microorganism, introduced to the UK by OptiBac Probiotics. 5 billion live cultures guaranteed per capsule. Does not interfere with medicines or supplement for Candida, IBS or diarrhoea. Well researched and used safely across the world for the last 50 years Ingredients:Live cultures: Saccharomyces boulardii (250mg); vegetarian capsule: hydroxypropyl methylcellulose; filler: potato starch; lubricant: vegetable magnesium stearate; antiadherent: silicon dioxide. S. boulardii is a natural and safe yeast with differing properties to other yeasts. Directions:1-4 capsules depending on severity of symptoms, up to 6 capsules daily Warnings:It is not recommended to give live cultures to patients who: are severely immunosuppressed, have pancreatitis, are in the Intensive Care Unit, have blood in the stool, have central venous catheters; or to post-surgical patients with open wounds, or infants with short bowel syndrome; unless under a doctor\'s care.