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...were very disappointed that [supplements] didn't work to prevent prostate cancer and other cancers," says Dr. Scott Lippman, professor of medicine at MD Anderson Cancer Center and lead author of the vitamin E and selenium study. "But the study illustrates the importance of establishing efficacy before recommending public health usage. There is very high consumption of these supplements, based on the assumption that they do prevent prostate cancer...
...what explains the discrepancies between the results of SELECT and previous studies? For one thing, says Dr. William Nelson, director of the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, the participants of the Finnish study were cigarette smokers, and may have suffered more oxidative damage in their cells than the average person. If smoking had caused excessive damage to their cells, then they would be more likely to benefit from any antioxidant effects provided by the vitamin supplements. In other words, perhaps people with lower levels of the vitamin in their blood to start - whether...
Given the large size of these new studies, however, some experts doubt that future research will controvert them. "If the focus is preventing prostate cancer, then there is nothing you can go to the health-food store and get in a bottle," says Dr. Patrick Walsh, a leading prostate-cancer specialist at Johns Hopkins School of Medicine. "Men are fooling themselves if they think that...
...attention to cancer trends, and the trend has been encouraging," says Dr. Richard Schilsky, president of the American Society of Clinical Oncology. "But we have forgotten that there is a big wide world out there. Cancer is a global problem." (See pictures of Cancer survivors...
...other subtypes of influenza to which humans are immune. They reside mostly in birds, although every once in a while a strain will suddenly develop the ability to infect people. "A virus like that gives people no time to develop protection or immunity, so almost everyone is susceptible," says Dr. Carolyn Bridges, an influenza expert at the CDC. "When that happens, we have a pandemic...