Yes, and no. Cranberry juice contains an elusive ingredient which has been shown to reduce the incidence of bladder infections. However, cranberry juice is also very acidic, which is not good for the urinary tract. Some people have a sensitive bladder lining, and they develop pain and burning with urination when they consume acidic fruits and beverages.

The same symptoms can also occur after eating spicy foods and drinking beverages containing alcohol, caffeine, and carbonated (fizzy) beverages. Many times these individuals think they have a bladder infection, while in fact they do not. Many patients have told me, "I keep drinking cranberry juice, but it just keeps burning". When they stop drinking the cranberry juice the pain magically resolves.

Cranberry juice, cola, coffee and tea also contain oxalate, which contributes to kidney stone formation. Ask anyone who has had a kidney stone how painful it is and you will surely want to avoid getting one. If you have already had a kidney stone it is especially important to reduce the oxalate in your diet. Other sources of oxalate include spinach, beets, nuts, chocolate and many fruits. Those wishing to avoid a kidney stone are also advised to avoid excessive sodium intake, but in all but rare cases calcium restriction is not necessary.

Jill G.Byers, M.D,
Diplomate, American Board of Urology
Member, South Bay Independent Physicians Medical Group, Inc.