Probiotics
Live microorganisms with strain-specific effects. Best evidence: preventing antibiotic-associated diarrhea. For everything else, results depend heavily on the strain.
What the science says
- Preventing antibiotic-associated diarrhea Moderate evidence
A meta-analysis of 63 randomized trials found probiotics reduced the risk of antibiotic-associated diarrhea by about 42%. Strains of Lactobacillus rhamnosus GG and Saccharomyces boulardii have the most support.
- General 'gut health' in healthy people Limited evidence
For people without a specific condition, evidence of meaningful benefit is weak. Effects are strain- and condition-specific — a generic probiotic is not guaranteed to do anything.
Dosage & safety
Studied doseTypically 1–10 billion CFU/day of a studied strain, taken during and after antibiotic courses for the best-supported use.
SafetySafe for healthy people. Avoid in severely immunocompromised patients without medical supervision.
Scientific references
Where to buy
California Gold Nutrition, LactoBif® 30 Probiotics, 60 Veggie Capsules
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Related in Gut health
- Psyllium Husk (fiber) Strong evidence
- L-Glutamine Limited evidence
- Oregano Oil Limited evidence
- Ginger Moderate evidence
- Inulin (Prebiotic Fiber) Moderate evidence
- Digestive Enzymes Limited evidence