The researchers concluded that multivitamins don't reduce the risk for heart disease, cancer, cognitive decline (such as memory loss and slowed-down thinking) or an early death. They also noted that in prior studies, vitamin E and beta-carotene supplements appear to be harmful, especially at high doses.

Are multivitamins really useless?

Although multivitamins may be beneficial for some people, they're unnecessary for most. In some cases, they may even provide excessive amounts of certain nutrients. If you want to boost your nutrient intake through diet alone, consider adding some of these nutritious, whole foods to your routine.

Are multivitamins worth taking?

Most people do not need to take vitamin supplements and can get all the vitamins and minerals they need by eating a healthy, balanced diet. Vitamins and minerals, such as iron, calcium and vitamin C, are essential nutrients that your body needs in small amounts to work properly.