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Evidence-Based Supplement Research
Evidence-Based Supplement Research

saccharomyces boulardii and Improved H Pylori Eradication Rates

Research synthesisModerate evidenceSmall effect4 studies · 3 beneficial · 1 neutral · 0 harmful

Across 4 studies, 3 reported beneficial effects of Saccharomyces boulardii on H. pylori eradication rates, with 1 neutral finding; the predominant effect size is small. The most studied population includes adults with H. pylori infection, with one trial using 250 mg twice daily for 14 days. Evidence from two meta-analyses (2025 and 2019) shows small but statistically significant improvements, though one RCT found no significant benefit.

  • Effective dose range: 250 mg twice daily
  • Studied populations: adults with H. pylori infection, including those with previous treatment failure

Caveats: Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed). The evidence base is small (only 4 studies) — conclusions should be considered preliminary. The only neutral study (2007) reported a numerically higher eradication rate (71% vs 59.7%) that did not reach statistical significance, suggesting the effect may be modest and inconsistent.

Generated May 21, 2026
Doses used in studies
  • mg/day: 500 (median 500, IQR 500500) 1 study
Time to effect
Median: 2 weeks · IQR 2 weeks2 weeks · Range 2 weeks2 weeks — Reported in 1 of 4 studies
Safety in these studies
4 of 4 papers
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