Cranberry juice reduces recurrent urinary tract infection

Drinking 50 ml of cranberry-lingonberry juice concentrate daily reduces recurrences of symptomatic urinary tract infection by about 50%. However, a lactobacillus GG drink has no effect. In an open randomised controlled trial Kontiokari and colleagues (p 1571) allocated 150 women who had a urinary infection caused by Escherichia coli to receive either 50 ml of cranberry-lingonberry juice concentrate daily for six months or 100 ml of lacrobacillus drink five days a week for one year or no intervention. At six months 1% of women in the cranberry group, 39% in the lactobacillus group, and 36% in the control group had had at least one recurrence. This translates to a 20% reduction in absolute risk in the cranberry group compared with the control group.

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Relevant Article

Randomised trial of cranberry-lingonberry juice and Lactobacillus GG drink for the prevention of urinary tract infections in women

Tero Kontiokari, Kaj Sundqvist, M Nuutinen, T Pokka, M Koskela, and M Uhari
BMJ 2001 322: 1571. [Abstract] [Full Text] [PDF]