Vitamins are compounds that your body needs to function and grow normally, as well as to repair itself and recover from illnesses. They are essential to keep your body working properly. The body can’t produce these compounds itself, so they must be consumed through the intake, usually through foods and drinks. The average person with a balanced diet usually gets about the right amounts of most vitamins, but if you feel down in a particular way it can be an indication that your body is short of a certain vitamin. So it’s important to know the use of each vitamin.