| http://www.w3.org/ns/prov#value | - This trial followed 29,133 male smokers in Finland who took supplements of about 50 IU of vitamin E (alpha-tocopherol), 20 mg of beta-carotene (more than 10 times the amount necessary to provide the daily requirement of vitamin A), both, or placebo daily for 5 to 8 years. (In contrast, vitamin E was found to reduce the risk of cancer, especially prostate cancer.)
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