Alternative medicineBy Mayo Clinic Staff
Many people drink cranberry juice to prevent UTIs, but there's no proven evidence that cranberry juice works to treat or prevent infection. Researchers continue to study the ability of cranberry juice or tablets to prevent UTIs, but results aren't conclusive.
If you enjoy drinking cranberry juice and feel it helps you, there's little harm in it. Just watch the calories. For most people, drinking cranberry juice is safe, but some people report an upset stomach or diarrhea.
However, don't drink cranberry juice if you're taking blood-thinning medication, such as warfarin (Coumadin, Jantoven); medications that affect the liver; or aspirin.
Nov. 30, 2016
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