For people who are taking antibiotics, or who have recently finished an antibiotic course, the strains of natural bacteria in this supplement are especially selected for their suitability and safety. The two high quality strains of natural bacteria, Lactobacillus acidophilus Rosell-52 and Lactobacillus rhamnosus Rosell-11, have been extremely well-researched, and are scientifically proven to survive to reach the gut alive, even during a course of antibiotics.Lactobacillus acidophilus Rosell-52 is a natural resident of the intestinal microflora; this specific strain from OptiBac has been well studied to survive gastric acidity and bile salts expected at mealtimes and to reach the intestines without damage. Lactobacillus rhamnosus Rosell-11 is a natural component of the friendly bacteria in the intestines; this species is one of the most studied in the world of live cultures. L. rhamnosus Rosell-11 has been proven to resist bile and gastric acidity over pH 3 - therefore if taken at mealtimes (when pH is around 4), it will pass through the stomach without being damaged.It is important to note that this supplement, unlike many other live cultures products, does not require refrigeration due to improvements in freeze drying techniques and the strains within the product that are naturally robust to survive harsher conditions.Available in one pack size of 10 capsules of live cultures. Each capsule provides a count of over 4 billion natural bacteria.This is a food supplement and it is not intended to prevent, treat, nor diagnose any medical conditions.About Optibac ProbioticsThe OptiBac Probiotics brand was created in 2004 by three siblings and their father, all with a passion for health & wellbeing. The brand specialises entirely in live cultures and considers this to be their expertise, with a particular emphasis on how different strains (specific types of live cultures) work in different ways. The strains found within OptiBac Probiotics are of the highest quality, and each strain undergoes rigorous testing - so you can be confident you'll find a high quality supplement for your individual needs.OptiBac Probiotics has partnered with some of the world-leading institutes in the field, and is dedicated to developing an expert range of the highest quality. The range boasts some of the most researched strains in the world. The company are completely transparent when it comes to the make-up of their products, and, unlike many others, they cite not only the microorganism's family and species, but the strain as well. OptiBac Probiotics is proud to be the brand that introduced a number of strains to the UK, including pure Saccharomyces boulardii, Bifidobacterium lactis BB-12, Lactobacillus rhamnosus GR-1 and Lactobacillus reuteri RC-14.Every day, customers from all around the world review OptiBac Probiotics and comment on how much they enjoy using the products. Why not try them yourself and see what you think?