" The results surprised scientists. Previous studies showed diets low in folic acid led to a higher risk of colon cancer."

" Now researchers speculate that some folic acid helps -- as long as the colon is free of microscopic cancer cells. But once cancer starts, folic acid may feed its growth."

" Some scientists who reviewed the new findings said folic acid fortification, now required in some U.S. foods to prevent birth defects, should not be increased
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