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SPECIALTY

D-Mannose

Urinary tract comfort

MODERATE EVIDENCEVEGANREAD THE RESEARCH
Written to our editorial standards · reviewed against published research· Updated 5 Jun 2026
Last reviewed: May 30, 2026
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D-Mannose: Urinary tract comfort. A simple sugar that helps flush bacteria from the urinary tract, popular for urinary comfort and prevention. Standard dose 2,000 mg, taken in the morning, about $14/month. Evidence rating: moderate evidence.

Where to buy

NOWFOODSD-Mannose Powder170 GDIETARY SUPP.
RECOMMENDED
NOW Foods, D-Mannose
2,000 mg · Morning · ~$14/month

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All product options

NOWFOODSD-Mannose Powder170 GDIETARY SUPP.BESTSELLER
D-Mannose Powder
NOW Foods
170 g · $16 · ★ 4.7
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JARROWFORMULASD-Mannose120 VEG CAPSDIETARY SUPP.BEST VALUE
D-Mannose
Jarrow Formulas
120 veg caps · $18 · ★ 4.7
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SOLARAYD-Mannose60 VEG CAPSDIETARY SUPP.PREMIUM
D-Mannose
Solaray
60 veg caps · $15 · ★ 4.6
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NATURE'SWAYD-Mannose60 CAPSULESDIETARY SUPP.PREMIUM
D-Mannose
Nature's Way
60 capsules · $17 · ★ 4.6
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What is D-Mannose?

D-mannose is a naturally occurring simple sugar, related to glucose, that is poorly metabolized and passes largely unchanged into the urine. There it can bind to the type of bacteria most often behind urinary discomfort, helping wash them out before they stick to the bladder wall. Several trials, mostly in women prone to recurring urinary issues, suggest D-mannose can reduce how often these episodes return, with tolerability similar to placebo. It is generally well tolerated, with loose stools the main complaint at high doses. A common approach is around 2 g daily for maintenance, taken with plenty of water. It supports comfort and prevention and is not a substitute for treating an active infection.

WHY IT MATTERS

A simple sugar that helps flush bacteria from the urinary tract, popular for urinary comfort and prevention.

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Common questions

What is D-Mannose?
D-mannose is a naturally occurring simple sugar, related to glucose, that is poorly metabolized and passes largely unchanged into the urine. There it can bind to the type of bacteria most often behind urinary discomfort, helping wash them out before they stick to the bladder wall. Several trials, mostly in women prone to recurring urinary issues, suggest D-mannose can reduce how often these episodes return, with tolerability similar to placebo. It is generally well tolerated, with loose stools the main complaint at high doses. A common approach is around 2 g daily for maintenance, taken with plenty of water. It supports comfort and prevention and is not a substitute for treating an active infection.
What is D-Mannose used for?
Urinary tract comfort. A simple sugar that helps flush bacteria from the urinary tract, popular for urinary comfort and prevention.
What is the standard dose of D-Mannose?
2,000 mg, typically taken in the morning. Approximate cost is $14 per month.
How strong is the evidence for D-Mannose?
Moderate evidence for its primary uses. See the full study list on the research page.

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