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Regular drinking of cranberry-lingonberry juice concentrate reduced recurrent urinary tract infections in women

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QUESTION: Does regular drinking of cranberry-lingonberry juice concentrate or Lactobacillus GG drink reduce recurrence of urinary tract infections (UTIs) in women?


Randomised {allocation concealed}*, blinded (outcome assessor), controlled trial with 12 months of follow up.


Student health service at the University of Oulu and occupational health centre for the staff of Oulu University Hospital, Finland.


150 women (mean age 30 y) who had a UTI caused by Escherichia coli (≥105 colony forming units [cfu]/ml in clean voided midstream urine) and were not taking any antimicrobial prophylaxis. Follow up at 12 months was 91%.


50 women were allocated to receive 50 ml of cranberry-lingonberry juice concentrate (7.5 g cranberry concentrate and 1.7 g …

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  • Sources of funding: Emil Aaltonen, Juho Vainio, and Alma and K A Snellman Foundations.

  • For correspondence: Dr T Kontiokari, Department of Pediatrics, University of Oulu, Oulu, Finland. tero.kontiokari{at}

  • * Information provided by author.