Evidence brief · Supplement
Cranberry for Recurrent UTI prevention
Evidence grade B — In susceptible groups
- Overall grade
- Grade B
- Last revised
- 1
- graded outcome
- 0
- references listed
Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.
1 at grade B — 1 graded row
What is known
Each outcome with its grade (how strong the evidence is, A to D), the size of the effect where the entry records one, and how often studies agree.
- Recurrent UTI preventionEvidence grade B
In susceptible groups
Moderatemixed
What is uncertain
Read off the same rows as above. Nothing here is added that the entry does not itself record.
- Studies disagree: Recurrent UTI prevention (mixed agreement).
The evidence in words
The verdict
For recurrent uti prevention, Cranberry earns evidence grade B (moderate effect, mixed consistency) — there is real evidence here. In susceptible groups
How it might work
Its A-type proanthocyanidins stop E. coli from adhering to the bladder wall, reducing colonization.
How to use it
Products standardized to ~36 mg proanthocyanidins daily for prevention.
Safety & cautions
Safe; juice carries sugar; theoretical mild warfarin interaction at high intake.
Bottom line
A legitimate UTI-prevention tool (not a treatment) if you get recurrent infections. Dose by PAC content, not juice.
How it is used
As the entry records it, from the studies it summarises. Not a recommendation for you — doses that suit a trial population may not suit you.
- Standard
- ~36 mg proanthocyanidins/day.
Goes with
- CranberryRead the full Cranberry monographEvidence grade B
Related reading
Entries that share this one's tags or conditions.
- Cranberry for Active UTI treatmentEvidence grade D — Not a treatmentEvidence grade D
- Cranberry for Recurrent urinary-tract infectionEvidence grade B — PreventionEvidence grade B
- D-Mannose for Recurrent UTI preventionEvidence grade C — Small trialsEvidence grade C
- Cranberry: dosage and how to take it~36 mg proanthocyanidins/day.Evidence grade B
Sources
This entry lists no references of its own — it is assembled from the entries it links to, whose sources are on their pages.
Last revised . A grade is this entry's reading of the evidence, not medical advice.