Saccharomyces Boulardii + MOS
The score explained
evidence, testing and value, weighed before price
Why 7.3 of 10: Provisional: strong for its specific use cases, situational otherwise.
- Good human evidence for antibiotic-associated and traveller's diarrhoea
- Survives antibiotics (it's a yeast, not a bacterium)
- Cheap
- Situational: less rationale for everyday use
- Not for the immunocompromised
what the evidence says
Saccharomyces boulardii is one of the better-evidenced probiotics for a specific job: multiple human trials support it for preventing antibiotic-associated diarrhoea and reducing traveller's diarrhoea risk. Because it is a yeast, antibiotics do not kill it, which is the practical reason clinicians reach for it. Evidence for general gut wellness outside those situations is much thinner.
Plain-language assessment of the human evidence. No cherry-picked citations.
reviews
Most reviewers take it for gut and report it doing its job quietly. Ratings cluster around 4.7 stars across retailer sites, with few complaints beyond shipping.
Stack this with
SupplementsCalifornia Gold Nutrition LactoBif 30 ProbioticsBoth target gut. California Gold Nutrition LactoBif 30 Probiotics covers the nutrient side of gut, a cheap daily base under everything else you do.
TestingAMILI Gut Microbiome TestBoth target gut. AMILI Gut Microbiome Test gives you a baseline for gut before you spend more on fixes.
FoodAMGD Dietitian-Designed Meal PlanBoth target gut. AMGD Dietitian-Designed Meal Plan handles the food side of gut without you having to think about it.