Many people take vitamins such as A, E and C, thinking that their antioxidant properties will prevent cancer. But some clinical trials have suggested that these antioxidants, which sop molecules DNA damaging called free radicals, have the opposite effect and increase the risk of cancer in some people. Now, in a provocative study that raises disturbing questions about the widespread use of vitamin supplements, Swedish researchers have shown that relatively low doses of antioxidants stimulate the growth of early lung tumors in cancer-prone mice, perhaps by preventing suppressor gene known tumor.
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