JAMA Clinical Evidence Synopsis
October 2, 2013

Cranberry Products and Prevention of Urinary Tract Infections

Author Affiliations
  • 1Centre for Population Health Sciences, Scottish Collaboration for Public Health Research and Policy, University of Edinburgh, Scotland
  • 2School of Public Health, University of Sydney, Sydney, Australia

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JAMA. 2013;310(13):1395-1396. doi:10.1001/jama.2013.277509

Clinical Question  Are cranberry products (juice, tablets, capsules, and syrup) associated with prevention of urinary tract infections (UTIs) compared with placebo or other treatments?

Bottom Line  Cranberry products are not associated with prevention of UTIs. However, lack of association of cranberry products with a reduced incidence of UTIs in clinical trials may be due to lack of participant adherence, lack of sufficient active ingredient in the cranberry product, or lack of sufficient statistical power.