Multivitamins are a common supplement designed to ensure that your body receives the full complement of vitamins. A typical diet does not supply all of the vitamins that a body uses to balance out the metabolic processes. The multivitamins are available many different formats, such as tablets, powders, capsules, and liquids. Multivitamins are of particular concern for those with limited diets, such as those on a weight loss regimen, vegetarians, people with food allergies, and those who are or have recently been ill. Multivitamins not only come in a wide variety of forms, but also in extremely varied compositions to allow for people with special conditions, or those who need more of a particular vitamin than another.