Saccharomyces boulardii
Also known as: brewer's yeast, S. boulardii
Effective Dosage
250-500 mg daily
✓ What the Science Says
Saccharomyces boulardii is a probiotic yeast that has been shown to be effective in preventing and treating antibiotic-associated diarrhea and in managing certain gastrointestinal disorders, such as irritable bowel syndrome. It works by restoring the natural flora of the gut and enhancing the intestinal barrier function.
✗ What It Doesn't Do
Saccharomyces boulardii is often marketed as a cure-all for digestive issues, but it does not eliminate the need for a balanced diet or proper medical treatment for serious gastrointestinal diseases. Additionally, it does not provide immediate relief from symptoms and should not be considered a substitute for antibiotics when needed.
Evidence-Based Benefits
Saccharomyces boulardii is a probiotic yeast that has been shown to be effective in preventing and treating antibiotic-associated diarrhea and in managing certain gastrointestinal disorders, such as irritable bowel syndrome. It works by restoring the natural flora of the gut and enhancing the intestinal barrier function.
Strong EvidenceEffective at: 250-500 mg daily
Source: auto-research
Absorption & Bioavailability
Moderate - While it survives gastric acid and reaches the intestines, its effects can vary based on individual gut health.
Red Flags to Watch For
- 🚩 Products claiming to cure all digestive diseases
- 🚩 High prices for low-quality formulations
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-03-07