Women
D-Mannose
Simple sugar studied for preventing recurrent UTIs by blocking E. coli adhesion in women with frequent infections.
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D-Mannose
Simple sugar studied for preventing recurrent UTIs by blocking E. coli adhesion in women with frequent infections.
44
C
evidenceSafe
riskProven Benefits
01May reduce recurrent UTIs
Chemical Forms
Recommended
- D-mannose powder
- D-mannose capsules
Avoid
- Pre-mixed D-mannose + cranberry blends (harder to titrate dose)
- Proprietary glyconutrient blends (dilute actual D-mannose)
Expert Note
Powder is easiest to titrate to 2 g doses; capsules are more convenient. Avoid blended products because they often underdeliver D-mannose and make dosing less precise.
Protocol
Amount
2 g
Frequency
Once daily
When
Any time of day — take with water; consistency matters more than timing.
Condition-Based Dosing
Women with recurrent UTIs (>3 episodes/year)
2 g daily for 3-6 months
Safety & Limits
Upper Safe Limit
No established UL; doses up to 6 g/day have been studied short term without serious adverse effects
Cycling
Safe for continuous use
Synergies
Cranberry proanthocyanidins and D-mannose act on different bacterial adhesion pathways, so the combination may broaden prevention coverage.
Updated Invalid Date