Vitamin E does nothing, except cost money, and beta carotene, which also costs money, may do something, but what it may do is not good. Those two opinions come from the U.S. Preventive Services Task Force, a 16-member panel that took an in-depth look at studies conducted over the past 10 years on vitamins. HealthDay reports that the panel, which reviewed five studies on multivitamins and 24 studies on individual or paired supplements, concluded that vitamin E doesn’t do anything to prevent heart disease or cancer, while beta carotene also doesn’t work and may increase the risk of lung cancer in people who are already at higher risk for the disease. Of six randomized controlled trials, HealthDay reports, none found significant benefits of vitamin E against heart disease or cancer. Another six clinical trials of beta carotene found no benefit, and two found proof of harm. On average, extra beta carotene increased the risk of lung cancer in smokers by about 24 percent. Save your money, and read more at HealthDay.