The U.S. Preventive Services Task Force says it cannot take a stance on the use of vitamin and mineral supplements for preventing cardiovascular disease or cancer because there is too little evidence on whether the products are effective against the diseases. But the agency says it remains against the use of beta-carotene or vitamin E supplements for heart disease or cancer. The new guidance agrees with recommendations by other groups, including the NIH and Academy of Nutrition and Dietetics.

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