D-Mannose
Other ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
Natural sugar that prevents UTI-causing bacteria from adhering to urinary tract walls.
Exploratory record, not a reviewed medical publication.
See the editorial and medical-review policies for the publication gate.
This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.
What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
D-Mannose is an other most often used for uti prevention, urinary tract health, bladder support. NutriStack rates the overall evidence as moderate. A typical adult dose is 500-2,000 mg daily (prevention) or 1,500 mg 3x daily (acute), commonly taken as d-mannose powder or capsules. This profile indexes 16 sources.
The bottom line
Evidence rating moderate. Most-documented uses: uti prevention, urinary tract health, bladder support. 16 sources indexed (2014–2026), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
E. coli bacteria have FimH lectins that bind mannose residues. Oral D-mannose saturates these binding sites, preventing E. coli adhesion to uroepithelial cells and promoting bacterial flushing.13,14
Dosing & protocol.
Dissolve in water; take on empty stomach for quick urinary excretion
What it actually costs.
Real-world pricing across three quality tiers. Assumes D-Mannose Powder / Capsules.
Assumes 500-2,000 mg/day for prevention. Vendor basis: BulkSupplements powder, NOW/iHerb, Vitacost, and Amazon marketplace; acute multi-dose use costs more. Updated 2026-05-28.
The same dose, as food.
How much you'd eat to match a supplemental dose.
Food sources are trace-level compared with urinary-health supplement dosing.
Full safety detail.
Side effects
- Bloating
- Loose stools at high doses
Contraindications
- Diabetes (monitor blood sugar, it is a sugar)
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Meta-analyses & systematic reviews
5- 1Efficacy of D-mannose as prophylaxis of recurrent urinary tract infection: a systematic review and meta-analysis of randomized controlled trialsPMIDVargas CEF, Mutarelli A, Menegardo LG et al. · Jornal brasileiro de nefrologia · 2025
Vargas CEF, Mutarelli A, Menegardo LG et al.. Efficacy of D-mannose as prophylaxis of recurrent urinary tract infection: a systematic review and meta-analysis of randomized controlled trials. Jornal brasileiro de nefrologia. 2025
- 2Nonantibiotic prophylaxis for urinary tract infections: a network meta-analysis of randomized controlled trialsPMIDSolomkin JS et al. · British Journal of Surgery · 2024
Network meta-analysis of 50 RCTs found D-mannose significantly reduced UTI incidence vs placebo (RR 0.34, 0.21-0.56).
- 3D-mannose for preventing and treating urinary tract infectionsPMIDCooper TE et al. · Cochrane Database of Systematic Reviews · 2022
Evidence is uncertain whether D-mannose prevents or treats UTIs; more well-designed RCTs with adequate power are needed.
- 4Role of D-Mannose in the Prevention of Recurrent Urinary Tract Infections: Evidence from a Systematic Review of the LiteraturePMIDKyriakides R, Jones P, Somani BK · European urology focus · 2021
Kyriakides R, Jones P, Somani BK. Role of D-Mannose in the Prevention of Recurrent Urinary Tract Infections: Evidence from a Systematic Review of the Literature. European urology focus. 2021
- 5D-mannose vs other agents for recurrent urinary tract infection prevention in adult women: a systematic review and meta-analysisPMIDLenger SM et al. · Journal of Urology · 2020
Pooled RR of UTI recurrence comparing D-mannose to placebo was 0.23 (95% CI 0.14-0.37), suggesting protective effect against UTI recurrence.
Randomized controlled trials
7- 6A randomized, triple-blind, placebo-controlled, parallel study of the efficacy of D-mannose for urinary tract infection symptoms in womenPMIDSingh RG, Nguyen E, Zhao Y et al. · Current urology · 2026
Singh RG, Nguyen E, Zhao Y et al.. A randomized, triple-blind, placebo-controlled, parallel study of the efficacy of D-mannose for urinary tract infection symptoms in women. Current urology. 2026
- 7Adding collagen, propolis plus quercetin, bacillus coagulans, hyaluronic acid and chondroitin sulphate to D-mannose avoids symptoms and prevents recurrence in women with recurrent urinary tract infections: a single-blind randomized controlled trialPMIDRiemma G, Vinci D, La Verde M et al. · Expert review of anti-infective therapy · 2025
Riemma G, Vinci D, La Verde M et al.. Adding collagen, propolis plus quercetin, bacillus coagulans, hyaluronic acid and chondroitin sulphate to D-mannose avoids symptoms and prevents recurrence in women with recurrent urinary tract infections: a single-blind randomized controlled trial. Expert review of anti-infective therapy. 2025
- 8D-mannose enhances immune function and modulates gut microbiota composition in adult cats: A randomized controlled trialPMIDWang J, Mei L, Wen H et al. · Research in veterinary science · 2025
Wang J, Mei L, Wen H et al.. D-mannose enhances immune function and modulates gut microbiota composition in adult cats: A randomized controlled trial. Research in veterinary science. 2025
- 9Randomized clinical trial of non-antibiotic prophylaxis with d-Mannose plus Proanthocyanidins vs. Proanthocyanidins alone for urinary tract infections and asymptomatic bacteriuria in de novo kidney transplant recipients: The Manotras studyPMIDRau M, Santelli A, Martí S et al. · Nefrologia · 2024
Rau M, Santelli A, Martí S et al.. Randomized clinical trial of non-antibiotic prophylaxis with d-Mannose plus Proanthocyanidins vs. Proanthocyanidins alone for urinary tract infections and asymptomatic bacteriuria in de novo kidney transplant recipients: The Manotras study. Nefrologia. 2024
- 10d-Mannose for Prevention of Recurrent Urinary Tract Infection Among Women: A Randomized Clinical TrialSource linkedPMIDHayward G, Mort S, Hay AD et al. · JAMA Internal Medicine · 2024
- 11D-mannose powder for prophylaxis of recurrent urinary tract infections in women: a randomized clinical trialPMIDKranjcec B et al. · World Journal of Urology · 2014
In 308 women, D-mannose (2g/day) reduced recurrent UTI rate to 14.6% vs 60.8% no prophylaxis; comparable to nitrofurantoin (20.4%) with fewer side effects.
- 12D-mannose: a promising support for acute urinary tract infections in womenSource linkedPMIDPorru D, Parmigiani A, Tinelli C et al. · J Chemother · 2014
Reviews & position papers
1- 13Role of D-mannose in urinary tract infections - a narrative reviewPMIDTabares G et al. · Annals of Nutrition and Metabolism · 2022
Exogenous D-mannose saturates E. coli FimH adhesins, preventing adhesion to uroplakin receptors on bladder epithelium and facilitating bacterial clearance.
Mechanistic & preclinical
1- 14d-Mannose Treatment neither Affects Uropathogenic Escherichia coli Properties nor Induces Stable FimH ModificationsPMIDScribano D et al. · International Journal of Molecular Sciences · 2020
D-mannose at clinical dosages does not affect E. coli metabolism or induce stable FimH variants, supporting long-term safety.
Reference material
2- 15Salvatore S, Ruffolo AF, Stabile G et al.. A Randomized Controlled Trial Comparing a New D-Mannose-based Dietary Supplement to Placebo for the Treatment of Uncomplicated Escherichia coli Urinary Tract Infections. European urology focus. 2023Source linkedPMID
- 16Lin J, Yang L, Liu T et al.. Mannose-modified exosomes loaded with MiR-23b-3p target alveolar macrophages to alleviate acute lung injury in Sepsis. Journal of controlled release : official journal of the Controlled Release Society. 2025Source linkedPMID
Common questions.
Quick answers about D-Mannose, drawn from the data on this page.
What is D-Mannose?
Natural sugar that prevents UTI-causing bacteria from adhering to urinary tract walls.
What is D-Mannose used for?
Commonly cited benefits of D-Mannose include: UTI prevention; Urinary tract health; Bladder support. NutriStack rates the overall evidence as moderate.
What is a typical dose of D-Mannose?
A typical adult dose of D-Mannose is 500-2,000 mg daily (prevention) or 1,500 mg 3x daily (acute). The commonly recommended form is D-Mannose powder or capsules. These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of D-Mannose?
Reported side effects include bloating, loose stools at high doses. This is educational information; check with a healthcare professional before use.
How strong is the evidence for D-Mannose?
NutriStack rates this as Moderate, meaning several aligned RCTs or one large RCT plus supporting reviews. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
Use this with your stack
D-Mannose in NutriStack.
Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.