150 women with a urinary tract infection were randomly allocated into three groups.
The first group received 50ml of cranberry-lingonberry juice concentrate daily, for 6 months. The second group got 100ml of lactobacillus drink 5 days a week, for one year, and the third group received nothing.
At 6 months, episodes of urinary tract infection were reduced by about half in the cranberry group, whereas the lactobacillus drink was ineffective.
|Cranberry juice halved UTI episodes.
|British Medical Journal|
Only 8 (16%) women in the cranberry group had at least one recurrence, compared with 19 (39%) in the lactobacillus group, and 18 (36%) in the control group.
This confirms the common belief that recurrences of urinary tract infection can be prevented with cranberry juice, say the authors.
Since cranberry juice is a readily available product, it provides an alternative means for preventing urinary tract infection and could lower the need for anti-microbial drugs.