Multivitamins can provide a variety of health benefits. Multivitamins can help people get the recommended amounts of vitamins and minerals they need, especially if they don't get enough from food alone. Multivitamins can help increase energy levels and convert more food into energy. Multivitamins can help strengthen the immune system. Multivitamins may help reduce the risk of cardiovascular disease. Multivitamins contain a variety of nutrients, including vitamins A, D, E, K, C, and B, as well as calcium, magnesium, iron, zinc, selenium, manganese, and chromium.