Article: Touted Diet Supplement Fails Tests; Beta Carotene Might Harm Some Patients

Beta carotene, long touted as a cancer fighter, does not prevent cancer when taken as a dietary supplement, according to the findings of two studies announced yesterday. On the contrary, the popular dietary supplement actually increases the risk of lung cancer and heart disease for some who take it.

Richard D. Klausner, director of the National Cancer Institute, said that researchers in charge of one study instructed research subjects to stop taking beta carotene and vitamin A after scientists observed a 28 percent increase in the number of lung cancers and a 17 percent increase in deaths among those taking the supplements, compared with a group taking a placebo.

Klausner expressed ...

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