If you're prone to developing urinary tract infections --- or UTIs --- you've probably heard that drinking cranberry juice can help. Like many other alternative-health remedies, this one is rooted in folk medicine tradition: Cranberries have been advocated for ailments ranging from urinary disorders and liver trouble to diabetes and cancer. In fact, there's some evidence that cranberry juice might help prevent urinary tract infections in some people. But it's no substitute for medical care if you already have an infection.
Urinary Tract Infections
A urinary tract infection can be uncomfortable and painful --- and serious, if it spreads to your kidneys. The infections commonly develop when bacteria take hold in the bladder or the urethra, which empties urine from the bladder. The infections are more common in women. According to MayoClinic.com, symptoms may include a strong, recurring urge to urinate, frequent urination that may cause a burning sensation, urine that is cloudy or tinged with blood, and urine that smells especially strong. The typical treatment includes antibiotic medication, which usually clears up the symptoms within a few days.
Cranberry Juice
Some research studies have found that drinking cranberry juice helped prevent urinary tract infections. The National Center for Complementary and Alternative Medicine explains that cranberries have elements that may stave off infection by preventing bacteria from sticking to cells along the urinary tract walls. But these studies are not regarded as definitive. In fact, a University of Michigan study found that drinking cranberry juice was slightly less effective at preventing recurrent infections in women than a placebo was. The study was published in "Clinical Infectious Diseases" in January 2011.
Advice and Precautions
While cranberry juice might not prevent urinary tract infections, there's probably no harm in trying it if you happen to like it. Some people may find that it causes diarrhea or an upset stomach. Studies that do show it to be effective indicate that it's most helpful for women, MayoClinic.com advises. Since there's no evidence cranberry juice can cure an existing infection, you should see your doctor if you suspect that you have one. And you should avoid cranberry juice if you take the blood thinner warfarin, which may interact with it and cause bleeding.
Prevention Tips
To reduce your risk of UTIs, MayoClinic.com and the American College of Obstetricians and Gynecologists advise you to drink plenty of water but avoid potentially irritating beverages, including coffee and other drinks with caffeine, alcohol and citrus soft drinks. Always wipe from front to back after urination and bowel movements, to avoid spreading bacteria. After intercourse, empty your bladder and drink a glass of water. Try to urinate promptly when you feel the urge. And avoid douches, powders and scented feminine products that can irritate the urethra.
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