The clearest current evidence remains mixed or uncertain, with the more defensible questions focused on Recurrent UTI Prevention Recurrent Urinary Tract Infection. Claims should stay limited to the graded outcomes shown below.
Each row is a different health effect. A means the support looks strongest, B likely helpful, C mixed or modest, and — not enough human evidence yet.
Papers are individual studies. Research reviews summarize evidence from multiple studies, such as systematic reviews and meta-analyses.
Safety is graded separately from benefits. Read these cautions first, especially if you take medication or have a medical condition.
A quick read on what this page supports right now.
Products that pass third-party quality testing.
Product quality data coming soon
Any future product listings should stay aligned with the specific graded outcomes and the separate safety rows shown here.
This page shows the current public rows for Cranberry: 8 unique research papers across 1 visible health effect. Safety rows are shown separately from benefit rows when available. The page includes 2 review-level papers and 6 direct human studies. Each supplement is graded by health effect using a certainty × effect matrix applied across PubMed evidence per health effect. Cochrane reviews and high-quality systematic reviews carry the most weight. See Methodology for full detail.
Read the full methodology → · Citation PDF coming soon