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For years, people have used cranberry juice to prevent and
urinary tract infections (UTIs). There is limited
proof that this is worth trying.
Pure cranberry juice, cranberry extract, or cranberry supplements may help prevent repeated UTIs in women.1 Using cranberry products to prevent UTIs may be expensive and some women complain of the taste. No one concentration of cranberry juice, extract, or supplements has been studied, so it's hard to know which product to choose.
If you do want to try cranberry juice to prevent UTIs, it's better to drink pure, unsweetened cranberry juice (rather than cranberry juice cocktail). Drinking cranberry juice cocktail doesn't seem to prevent UTIs better than drinking any other fruit juice.2
There is no proof that cranberry can cure a UTI. Cranberry
is not well tested as a UTI treatment.
may affect how warfarin works, which can be dangerous. If you are taking the
anticoagulant medicine warfarin (such as Coumadin), talk to your doctor before
using cranberry to prevent a UTI.
Jepson RG, Craig JC (2008). Cranberries for preventing
urinary tract infections. Cochrane Database of Systematic Reviews (1).
Barbosa-Cesnik C, et al. (2011). Cranberry juice fails to prevent recurrent urinary tract infection: Results from a randomized placebo-controlled trial. Clinical Infectious Diseases, 52(1): 23–30.
May 16, 2011
E. Gregory Thompson, MD - Internal Medicine & Avery L. Seifert, MD - Urology
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