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The war on radicals. (free radicals)
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Discover
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July 1, 1994
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Copyright informationCOPYRIGHT 1994 Discover. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Free radicals are bad: flies live longer without them. But smokers live longer without vitamin pills. Broccoli remains a good idea.
ONE OF THE CENtral ironies of our lives has to do with our metabolism: we need oxygen to extract energy from food, yet oxygen kills us in the end. At least that is what some biologists have suspected for more than 40 years now. As an accident of oxygen respiration, the theory goes, we produce aggressively reactive molecules called free radicals, which then proceed to attack our DNA, our proteins, and the fatty membranes of our cells. The mounting cellular damage weakens and withers us as we age. It also makes us more susceptible to cancer ...
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