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evidence · mechanism · dose
Supplements/Herb

Cranberry Extract

Vaccinium macrocarpon for UTI prevention.

Immune FunctionWomen's Health

Overview

Vaccinium macrocarpon for UTI prevention.

Natural sources
    Common forms

      Mechanism of action

      Proanthocyanidins prevent E. coli adhesion.

      Pathways

        Effects on the body

        Organ system effects

        Evidence-based benefits

        Reduces UTI recurrence

        Moderate evidence

        Potential side effects

        Common
        • · GI upset
        Rare
          Serious

            Drug interactions

            No notable interactions reported.

            Safety & non-supplemental interactions

            Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.

            Avoid if you are
            • ·Pregnant or breastfeeding (insufficient safety data)
            • ·Children under 18 (unless directed by a clinician)
            Avoid with these conditions
            • ·Autoimmune disease (theoretical immune activation)
            Avoid / monitor with these medications
            • ·Immunosuppressants

            Supplement interactions

            Pairs well with

            None listed.

            Avoid combining with

            No specific avoidances listed.

            Dosing & bioavailability

            Typical dose
            500 mg standardized

            Where to buy

            Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

            Herb
            Cranberry Ex…
            Amazon
            Wide selection · fast shipping
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            iHerb
            Global delivery · curated brands
            Herb
            Cranberry Ex…
            Thorne
            Practitioner-grade · NSF tested

            Scientific evidence (8)

            Meta-analysisCochrane · 2012

            Cranberry for UTI prevention

            Jepson RG, et al.

            24 RCTs

            Key findings

            Reduced UTI risk in women.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Cranberry Extract — Reduces UTI recurrence

            Live PubMed search

            Live results for "Cranberry Extract Reduces UTI recurrence" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Cranberry Extract and "Reduces UTI recurrence". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Cranberry Extract — randomized controlled trial

            Live PubMed search

            Live results for "Cranberry Extract randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Cranberry Extract and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Cranberry Extract — meta-analysis

            Live PubMed search

            Live results for "Cranberry Extract meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Cranberry Extract and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Cranberry Extract — pharmacokinetics

            Live PubMed search

            Live results for "Cranberry Extract pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Cranberry Extract and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Cranberry Extract — safety adverse events

            Live PubMed search

            Live results for "Cranberry Extract safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Cranberry Extract and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Cranberry Extract — dose response

            Live PubMed search

            Live results for "Cranberry Extract dose response" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Cranberry Extract and "dose response". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewGoogle Scholar · 1970

            Google Scholar: Cranberry Extract — clinical evidence

            Live Scholar search

            Cross-database citation index for Cranberry Extract as it relates to "clinical evidence".

            Key findings

            Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

            Open study
            Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.