Lung Cancer

Broccoli Helps Prevent Lung Cancer
A new study published in the Lancet suggests that the natural chemicals in broccoli, cabbage, bok choy, and other cruciferous vegetables may protect against lung cancer. Of 18,000 men studied, those with detectable isothiocyanates, a phytochemical, in their blood had a 36 percent lower chance of developing lung cancer than those with none.

Researchers warned the public not to depend on vegetables as infallible immunity against the strong cancer-causing effects of smoking or to rely on isothiocyanate supplements if they are ever produced. More than 20 different varieties of these compounds work intricately together in the body in ways that can't be duplicated in pill form. In fact, antioxidants taken in doses higher than that which occurs naturally in plant foods can actually increase cancer risk. The lesson, report investigators, is simple: "Just eat your vegetables, and lots of them."

Michuad DS, Feskanich D, Rimm EB, et al. Intake of specific carotenoids and risk of lung cancer in two prospective U.S. cohorts. Am J Clin Nutr 2000;72:990-7.

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