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Blackberries, Broccoli Sprouts Battle Cancer
Date:12/6/2007

Raw vegetables like broccoli also keep some malignancies at bay, research shows

THURSDAY, Dec. 6 (HealthDay News) -- Your local farmer's market might hold the key to cancer prevention, since new research shows that black raspberries, broccoli sprouts and some raw vegetables reduce the risk of esophageal and bladder cancers.

Data from three studies on the subject was presented Thursday at the American Association for Cancer Research's Sixth Annual International Conference on Frontiers in Cancer Prevention, in Philadelphia.

Fruits and vegetables have long been known to help reduce the risk of certain cancers. Based on prior research, the American Cancer Society recommends eating five servings of fruits and vegetables daily.

In the first study, Ohio State University researchers found black raspberries may protect against esophageal cancer by reducing the oxidative stress that results from Barrett's esophagus, a precancerous condition usually caused by gastroesophageal reflux disease. The esophagus is a long tube that connects the throat to the stomach. Reflux disease causes stomach acid to continually splash back up into the esophagus.

"Specifically in the case of Barrett's patients, reflux of the stomach and bile acid contribute to ongoing oxidative damage. Thus, our hypothesis is that feeding a food that is high in potential protective constituents, such as antioxidants, vitamins, minerals and other phytochemicals, may help restore the oxidative balance," lead researcher Laura Kresty said.

People with Barrett's esophagus typically are 30 to 40 times more likely to develop esophageal cancer, which has a poor five-year survival rate of 15 percent.

The team gave 32 grams to 45 grams of black raspberries daily for six months to 20 patients with Barrett's esophagus. They analyzed changes in blood, urine and tissue before, during and after the treatment, and found lower levels of some of the
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