Perhaps tomatoes, which is a source of selenium, and Vitamin E may prevent prostate cancer. And perhaps not! What's the latest thinking on antioxidants, like vitamin E and selenium, and prostate cancer prevention?
At least in the test tube, Vitamin E, might inhibit the growth of cancer cells. A clinical study giving men 200 mcg of selenium, or 400 IU of vitamin E, a combination of both, or a placebo showed that men taking the supplements were no less likely to have prostate cancer than those taking the placebo.
Another study that included physicians taking Vitamin E and Vitamin C found that a diagnosis of prostate cancer or cancer in general was just as common among people taking vitamin E or C as it was among those taking a placebo.
Bottom Line: it appears that no single agent is likely to prevent prostate cancer. My advice is that men should not take antioxidant supplements in hopes of preventing prostate cancer.