In 'For every day' (formerly called 'For daily wellbeing'), the acidophilus and other bacteria have been selected for their specific, scientifically proven qualities such as their ability to survive to reach the gut alive. 'For every day' contains a variety of well-researched and documented strains, which are thought to settle in different parts of the small and large intestine or colon. Sugar free With no added sugars, artificial flavourings or colourings, OptiBac 'For every day' (formerly known as 'For daily wellbeing') provides a good alternative to sugary yoghurts and yoghurt drinks containing live cultures. Lactobacillus acidophilus Rosell-52 and Lactobacillus rhamnosus Rosell-11 : These live cultures are amongst the most well-researched and documented species of natural bacteria in the human gut. The specific strains of L. rhamnosus and L. acidophilus from OptiBac have been studied to survive your gastric acidity and bile salts and to reach the intestines without damage. Bifidobacterium longum Rosell-175, Bifidobacterium breve Rosell-70 and Bifidobacterium bifidum Rosell-71 : Colonise primarily in the large intestine (or colon). Lactococcus lactis Rosell-1058 : This strain from OptiBac is obtained from the kefir culture and is tested in vitro for its antimicrobial properties. FOS fibres: The non-digestible FOS (Fructooligosaccharides) can act as a food source to stimulate growth of your body's live cultures, the Bifidobacteria in particular; creating what is known as a 'bifidogenic' effect.