硫氰酸甲酯：蔬菜抗癌的秘密武器

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Studies show how fruits and veggies reduce cancer

WASHINGTON (Reuters) - Just three servings a month of raw broccoli or cabbage can reduce the risk of bladder cancer by as much as 40 percent, researchers reported this week.

Other studies show that dark-colored berries can reduce the risk of cancer too -- adding more evidence to a growing body of research that shows fruits and vegetables, especially richly colored varieties, can reduce the risk of cancer.

Researchers at the Roswell Park Cancer Institute in Buffalo, New York, surveyed 275 people who had bladder cancer and 825 people without cancer. They asked especially about cruciferous vegetables such as broccoli and cabbage.

These foods are rich in compounds called isothiocyanates, which are known to lower cancer risk.

The effects were most striking in nonsmokers, the researchers told a meeting being held this week of the American Association of Cancer Research in Philadelphia.

Compared to smokers who ate fewer than three servings of raw cruciferous vegetables, nonsmokers who ate at least three servings a month were almost 73 percent less likely to be in the bladder cancer group, they found.

Among both smokers and nonsmokers, those who ate this minimal amount of raw veggies had a 40 percent lower risk. But the team did not find the same effect for cooked vegetables.

\"Cooking can reduce 60 to 90 percent of ITCs, (isothiocyanates),\" Dr. Li Tang, who led the study, said in a statement.

A second team of researchers from Roswell Park tested broccoli sprouts in rats.