D-Mannose
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D-Mannose. Simple sugar that binds E. coli fimbriae, flushing them from the urinary tract.
How it works. E. coli FimH binds mannose preferentially over urothelium, flushing bacteria in urine.
What the research supports. 1 graded claims. Strongest: Reduces recurrent E. coli UTI (moderate).
How much to take. Typical dose: 2 g × 2–3/d acute; 1–2 g/d prevention.
Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.
Stacking. Pairs well with A high-quality multivitamin, Omega-3 (EPA/DHA).
Common forms. Available as D-mannose powder.
Key studies. 8 studies cited. The strongest are listed with links to PubMed.
Community. Experiences from people who have tried D-Mannose. Anecdotes are not medical advice.
D-Mannose. Simple sugar that binds E. coli fimbriae, flushing them from the urinary tract.
What it is
Simple sugar that binds E. coli fimbriae, flushing them from the urinary tract.
Food sources
Goals
How it works
E. coli FimH binds mannose preferentially over urothelium, flushing bacteria in urine.
Pathways
- Bacterial anti-adhesion
Effects
- ↓Recurrent UTI episodes decreases
What the research supports
Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.
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Side effects & interactions
Common side effects
- Diarrhea (high dose)
Medication interactions
Always disclose D-Mannose use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.
Check any supplement–medication combination with your pharmacist before starting.
Combines with
Pairs well
- A high-quality multivitaminCovers micronutrient cofactors that support most supplement pathways.
- Omega-3 (EPA/DHA)Foundational anti-inflammatory support that complements most regimens.
Common forms
- D-mannose powder
Key studies
8 studies cited in total.
Opens current human and preclinical literature matching D-Mannose and "Reduces recurrent E. coli UTI". Filter by RCT, meta-analysis, or year on the results page.
Opens current human and preclinical literature matching D-Mannose and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.
Opens current human and preclinical literature matching D-Mannose and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.
Discussion
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