men who took multivitamins. Yet other studies have found that beta-carotene supplements may actually increase the risk of lung cancer in smokers, the task force review noted, and that high doses of vitamins A and E cause harm and may increase the risk of death.
There have been few randomized clinical studies of the effects of multivitamins and minerals on heart disease, cancer and risk of death, said Dr Stephen P Fortmann, of the Kaiser Center of Health Research, who led the task force review. A draft of new task force recommendations, based on the updated review, said there was insufficient evidence to recommend taking or not taking vitamins.
Roni Caryn Rabin