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Finnish Research: Diet Affects UTI Risk

Popular belief has long held that diet influences a woman's resistance to urinary tract infections (UTIs). That belief now has scientific backing thanks to a Finnish research team who published promising data in the March 2003 issue of the American Journal of Clinical Nutrition.

The research project centered on the dietary and lifestyle habits of 324 women, with an average age of 31. Out of this number, 139 were diagnosed with frequent and recurring urinary tract infections. The remaining 185 had no history of UTIs. The research results indicate that certain dietary habits, such as drinking berry juice and eating yogurt, are associated with lower rates of UTI.

Yogurt, Bacteria, and the Intestines
The dietary research complied by the Finnish study determined that women who eat "fermented milk products," most notably yogurt, three to four times a week were significantly less likely to have urinary tract infections than women who ate the same products only once a week.

It may be that the active bacteria cultures in yogurt protect women against UTI bacteria. Most urinary tract infections are caused by coliform bacteria, common bacteria in the digestive system that are often found in stool. Coliform bacteria that travel up the urinary tract are a frequent cause of UTI.

Bacterial cultures in yogurt may alter levels of coliform bacteria in the intestinal tract, resulting in lower levels of those bacteria in stool and lowering the chances of urinary tract contamination.

Berry Juice and Flavonols
Berry juice also seems to lower the risk of urinary tract infection. Women who drank 6.5 ounces of berry juice a day had less urinary tract infections than women who drank smaller amounts.

Berry juice contains high levels of flavonols, antioxidants that may interfere with coliform bacteria. The bacteria "bind" to cells in the urinary tract lining during infection. Flavonols may prevent the bacteria from attaching to urinary tract cells. Of all the different types of berry juice, cranberry juice appears to be one of the most effective for UTI prevention.

The Importance of Prevention
The Finnish dietary study comes at an important time for urinary tract infection research. UTI bacteria is becoming more resistant to antibiotics, making conventional treatment of urinary tract infections more difficult and less effective. New treatments and UTI vaccines are under development in clinical trials, but cannot be made available to the general public until their effectiveness is proven. Until these treatments are approved, dietary changes may lower the rate of urinary tract infections amongst women who suffer from frequent UTIs.


Resources

Better Nutrition. (2003). Berry good cure. Retrieved December 30, 2003, from
www.findarticles.com/cf_dls/m0FKA/6_65/101940125/p1/
article.jhtml.

Health and Age. (2003). Can your diet prevent a urinary tract infection? Retrieved December 30, 2003, from
www.healthandage.com/Home/gm=20!gid2=2375.



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