Bacillus clausii
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A spore-forming probiotic bacterium used in supplement form as live or spore-based cultures.
Why it’s used
Taken to support gut microbial balance, commonly used alongside or after antibiotic courses, and marketed for general digestive support.
What the evidence is for
reducing duration of acute infectious diarrhea.
What the evidence says
Systematic reviews of probiotics for acute infectious diarrhea, which have included Bacillus clausii strains, report some benefit in reducing diarrhea duration, though study quality and strain specificity vary and results are not uniformly strong across all probiotic products.
Context
Clinical trials generally used specific proprietary strains and defined colony-forming-unit doses rather than a standardized mass-based dose, and results are most consistent for acute diarrhea in children rather than general digestive wellness.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.