Dr. Lenore Arab of the David Geffen School of Medicine at UCLA also took part, presenting results of a review of 400 studies on coffee consumption and cancer risk.
There is evidence, noted that the Arab Beverages May protect against certain types of cancer of the colon, rectum, and liver cancer, and possibly by reducing the amount of cholesterol, bile acid and natural sterol secretion in the colon, speeding up the passage of stool through the colon (and thus cutting exposure of the lining of the intestine to potential carcinogens in food) and through other mechanisms as well.
However, the Arabs have found evidence that coffee May increase risk of leukemia and stomach cancer, with cases of leukemia are stronger.
The results suggest that persons who May be vulnerable to these risks - for example pregnant women and children - should limit coffee consumption, van Dam noted in an interview.
He and his colleagues are currently conducting a clinical trial to get a clearer picture of the prevention of diabetes effects of coffee, which were first reported in 2002. Since then, he noted, there were more than 20 studies on the subject.
Van Dam and his team are also looking for which hundreds of thousands of components of coffee might be responsible for these effects. It's probably not caffeine, he noted, because caffeine and decaffeinated coffee have similar effects on reducing the risk of diabetes.
His top candidate, van Dam says, is chlorogenic acid, an antioxidant that slows the absorption of glucose in the intestine.
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