People who take high doses of vitamin E to improve their health may not be getting any benefits and may, in fact, be slightly increasing their risks of dying earlier, researchers reported yesterday. The adverse effect was tiny, however, and some experts with no connections to the vitamin industry say they are not convinced it was demonstrated. It emerged only when the researchers pooled the results from 19 clinical trials involving 135,967 participants. That led them to conclude that there were 39 additional deaths per 10,000 people who were taking vitamin E doses exceeding 400 international units a day. The...