Cranberry extract

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The short answer

Certain products reduce recurrent urinary-tract infection risk in some groups; they do not treat an active infection.

Evidence and scope: Supported for specific outcomes
This status does not grade the ingredient for every goal, outcome, or person.
Important limitation: Evidence supports a specific outcome, not a general wellness or longevity effect.
Before deciding: Key concern: Warfarin, kidney stones, diabetes/high-sugar juice, pregnancy, fever, or kidney pain require review.

01 / PRACTICAL GUIDE

Dose, absorption, and combinations

These are indication-specific reference or studied ranges—not a personalized prescription. Start with the objective, then check the form, label, medicines, and health conditions.

Reference range by objective

Urinary symptomsAbout 36 mg/day proanthocyanidins in many standardized products

Reference or studied range—not a personalized prescription. The product label or a clinician may specify a different dose.

Dose source ↗

More is not automatically better. A clinician or product label may specify a different amount.

Absorption / solubilityWater-soluble

Water-soluble or readily water-dispersible. This does not mean excess is always harmless.

How it is commonly taken

Take consistently with fluid; verify PAC measurement method.

Do not combine casually

Warfarin, kidney stones, diabetes/high-sugar juice, pregnancy, fever, or kidney pain require review.

Dose and use source ↗

Dose and use links lead to primary or official source material. Search links are discovery tools, not proof that every returned paper applies.

02 / EVIDENCE

What the research says

We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.

1research papers in this ledger

50unique primary studies represented

8,857unique participants represented

These are audited counts for this JIVANA collection, not search-result totals. Participants are counted once when multiple papers use the same cohort; review papers are not added again to participant totals.

Open the research timelineResearch timeline

Entries are ordered by publication year. A study period appears only when the source reports it.

2023

Mixed or qualifiedPMID 37947276 · CD001321

Cranberry products for preventing urinary tract infections

Moderate-certainty evidence found fewer recurrent UTIs in women, children, and people susceptible after interventions. Benefit was not supported in institutionalized older adults, pregnant women, or adults with incomplete bladder emptying, and product form or proanthocyanidin dose remains uncertain.

Published: 2023n=8,857 participants50 primary studies represented

Study design and methods

Design: Cochrane systematic review of 50 randomized or quasi-randomized trials
Population: 8,857 randomized participants across six UTI-susceptible population groups
Intervention: Cranberry juice, tablets, capsules, or other products versus placebo, no treatment, antibiotics, probiotics, or another cranberry regimen
Outcome: Symptomatic, culture-verified urinary tract infections, adverse effects, and adherence

Funding or conflict note: Review authors reported no relevant interests.

Open research record ↗

Unscreened discovery appendix—not evidence46 candidate publicationsSearch run: Aug 21, 2026

Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.

03 / SOURCES

Start with the source material

Official evidence overviewPubMed bounded human-evidence search Live PubMed discovery searchNational Library of Medicine

The live search is for discovery only. Search-result counts change and are not included in the audited totals above.

Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.

04 / EXPERT CONTEXT

Expert context—not evidence

Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.

No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.