Probiotics and Saccharomyces Boulardii: what the published research says
PubMed indexes 3 records that name Probiotics and Saccharomyces Boulardii together, either in the title or in an interaction, co-administration, or pharmacokinetic context. 2 further sources came from NutriStack’s own review rather than from that query, and are labelled as such. Each one is listed below with its study design and, where the abstract states one, the authors’ own conclusion, quoted and linked. This page reports that literature. It does not tell you whether to combine them.
Every statement below is attributed to a named, dated, linked source.
This page lists published research relevant to Probiotics and Saccharomyces Boulardii. It deliberately does not state whether the combination is safe, whether it interacts, in which direction, at what dose, or how far apart to take them.
A study appearing here is not proof that an interaction exists. Two substances can be named together in a paper that never tested them in combination, and a source listed as background may cover only one of them.
Findings are quoted from each abstract as the authors wrote them. NutriStack has not re-analysed, pooled, or reconciled them, and they may disagree with each other.
NutriStack’s own interaction assessment for this pair is not published here. It has not completed qualified-human clinical review, so it is withheld from search. See the publication gate.
Nothing here is medical advice. Decisions about prescription medication and supplements belong with your prescriber or pharmacist, who can see your full regimen.
The research
5 studies naming Probiotics and Saccharomyces Boulardii.
Hand-reviewed sources first, then papers naming both substances in the title, then human trials and systematic reviews.
Meta-AnalysisResearch Support, N.I.H., ExtramuralResearch Support, U.S. Gov't, Non-P.H.S.Systematic Review
“The pooled evidence suggests that probiotics are associated with a reduction in AAD. More research is needed to determine which probiotics are associated with the greatest efficacy and for which patients receiving which specific antibiotics.”
Selected by hand during source review for Probiotics and Saccharomyces Boulardii, rather than by the automated PubMed query. It covers one side of the pair; it is listed as background the reviewer relied on, not as a study of the combination.
“The use of S. boulardii as a therapeutic probiotic is evidence-based for both efficacy and safety for several types of diarrhea.”
Selected by hand during source review for Probiotics and Saccharomyces Boulardii, rather than by the automated PubMed query. It covers one side of the pair; it is listed as background the reviewer relied on, not as a study of the combination.
Frontiers in cellular and infection microbiology · 2025 · PMID 40630636
Multicenter StudyHuman subjects
“Any type of antibiotic treatment cause diarrhea in infants and young children. Probiotics especially Saccharomyces boulardii co-treatments with any type of antibiotic treatment, significantly reduce incidences of diarrhea in infants and young children with manageable adverse effects.”
Names both Probiotics and Saccharomyces Boulardii in its title.
“A robust body of evidence from clinical trials and meta-analyses shows that the timely administration of an adequately dosed probiotic (upon initiation of antibiotic treatment or within 48 h) can help to prevent or resolve the consequences of antibiotic-associated dysbiosis (such as diarrhoea) and promote the resilience of the gut microbiota and a return to the pre-antibiotic state.”
Names both Probiotics and Saccharomyces Boulardii in its title.
“In conclusion, adding S. boulardii to vancomycin reduced CDI recurrence without affecting functional recovery or increasing adverse events.”
Names Probiotics and Saccharomyces Boulardii together in an interaction, co-administration, or pharmacokinetic context.
Limitations
What this evidence cannot tell you.
Search-based evidence indexes have real limits, and it is worth being explicit about them:
Selection. These records were found by searching PubMed titles and abstracts for both substance names alongside interaction and pharmacokinetic terms. Relevant work that phrases things differently, or is not indexed in PubMed, will be missing.
No effect size. The quoted conclusions are the authors’ words about their own study. We have not extracted effect direction or magnitude, and a single study’s conclusion is not a consensus.
Population mismatch. Findings in healthy volunteers, animals, or a specific patient group may not transfer to you, your dose, or your formulation.
Absence is not safety. Few published studies means the combination is under-studied, which is not the same as established as safe.
Nearby evidence
Other pairs with published research.
Pages covering Probiotics or Saccharomyces Boulardii alongside a different substance.
NutriStack is a free iPhone app for organising a supplement routine: what you take, when, and what the published record says about it. Its exploratory interaction checker covers Probiotics, Saccharomyces Boulardii, and several hundred other substances.
The checker is a research and organisation tool, not a clinical decision aid, and its per-pair assessments are excluded from search until they pass claim-level review.
NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.
