OptiBac Travel Abroad. OptiBac Travel Abroad is a supplement providing well-researched strains of live cultures, including Lactobacillus acidophilus Rosell-52 and Saccharomyces boulardii, which have been tested to ensure their survival in transit through to the intestines where they are needed. Saccharomyces boulardii can bind to and remove E-coli from the stomach. E-coli is a major cause of stomach bugs, making it a great choice of supplement to protect against tummy bugs when you are on holiday abroad.





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