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Saccharomyces boulardii is a well-documented, natural and safe yeast with different properties and actions to other yeasts. This extremely well-researched and unique strain has been used safely around the world for over 50 years.

Suggested for daily use, each capsule provides 5 billion live microorganisms guaranteed, and survives through stomach acidity to reach the gut alive.

Each pack contains 40 capsules.


  • EXTREMELY WELL-RESEARCHED – Saccharomyces boulardii is a well-researched, internationally acclaimed strain of yeast, proven to reach the gut alive without the need for a special protective coating
  • GUARANTEED BILLIONS – 5 billion live microorganisms per capsule, guaranteed until end of expiry, with OptiBac you get billions you can count on
  • ROBUST YEAST – Friendly yeast, more robust to environmental stressors than common bacterial live cultures, and especially stable and resistant to heat and humidity
  • SHELF STABLE – No refrigeration required, contrary to some other live cultures supplements, OptiBac selects strains that are naturally more robust so they do not require refrigeration
  • VEGAN – Used safely for over 50 years, suitable for vegans and vegetarians, and gluten free for those with coeliac disease or an intolerance


Adults: take one to four capsules initially, and depending on severity of symptoms take up to six capsules daily; or as professionally directed. Children (one year and over): take in smaller doses For children or anyone unable to swallow capsules, the capsule can be opened and the contents can be mixed with cold food or drink.


Do not exceed recommended daily dosage. Food supplements should not be used as a substitute for a healthy diet and lifestyle. Pregnant or breastfeeding women, or those with serious medical conditions, should consult their doctor before use. For children the dosage can be lowered. OptiBac Live Cultures may be used on an ongoing basis and can safely be used on either an occasional or daily basis, depending on reasons for use.


Live cultures: Saccharomyces boulardii (250mg); vegetarian capsule: hydroxypropyl methylcellulose


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