Is taking a multivitamin in the morning as routine for you as brushing your teeth? This is one healthy habit that some doctors are urging you to ditch. In an editorial in the Annals of Internal Medicine published this week, the authors are blunt: "stop wasting money on vitamin and mineral supplements." There's no good evidence that vitamin supplements offer health benefits, they say. What's more, there's some evidence that high doses of certain supplements -- beta-carotene, and vitamins E and A -- could potentially be harmful.