OptiBac Probiotics for Every Day Extra Strength is OptiBac\'s best-selling probiotic supplement which is easy to take on the go. __Key Benefits:__ - Provides 5 billion live microorganisms per capsule - Does not require refrigeration - May help maintain a strong immune system - Scientifically proven strains which reach the gut alive This advanced, dairy-free supplement from OptiBac contains 5 extensively researched strains, such as L. acidophilus NCFM and B. bifidum Bb-02, in an extra strength dose of 20 billion live microorganisms per capsule, which includes 5 billion live cultures of Lactobacillus acidophilus NCFM, thought to be the most researched strain of acidophilus in the world. OptiBac Probiotics for Every Day Extra Strength 90 is for anybody who is looking for daily good bacteria to complement their gut health. This is an easily digestible, sugar-free alternative. The OptiBac strains in For Every Day Extra Strength (formerly known as *For Daily Wellbeing Extra Strength) are some of the world\'s most researched and documented strains. All of the friendly bacteria in this supplement are scientifically proven to pass through stomach acidity to reach the gut alive. What\'s more, this natural supplement is free from sugars, fats and flavourings that may be found in other food & drinks containing live cultures. Research has shown that the quality of the bacteria strain is more important than the quantity of the bacteria. The best probiotics will list their strains as well as the species of bacteria. This helps to show transparency and help you identify the research that has been carried out on each strain in particular. OptiBac Probiotics For Every Day Extra Strength contains acidophilus and a number of other strains which have been scientifically proven to reach the gut alive. This helps them to settle in different parts of the gut, from the small intestine to the large intestine. Suitable for vegetarians and vegans.