Saccharomyces boulardii is a unique, well established probiotic which supports digestive health during episodes of diarrhoea; working fast and effectively, but naturally. OptiBac Probiotics were the first British company to do the Saccharomyces boulardii probiotic, formerly known as ‘DiarSafe’ - a favourite of health practitioners nationwide. For bowel calm contains a generous 5 billion live microorganisms of pure S. boulardii per capsule. This is one of the most research probiotic species in the world, and can even be given to children from 3 years onwards, and the elderly; without causing constipation like anti-diarrhoeal medicines. For bowel calm is also available in an 80 capsule pack size for regular use.