Single vitamin supplements are designed for those who are in need of a particular vitamin, rather than the full multitude of vitamins that are contained in a multivitamin supplement. Single vitamins can be useful for those who
have a specific dietary deficiency, as a single vitamin supplement may have higher dosages of a certain vitamin than others. As different vitamins work towards different parts of the body and metabolic process, it also allows the user to target their supplementation at a particular benefit or health issue. Vitamins function in a variety of ways throughout the body, and a vitamin deficiency can be cause a wide variety of health issues.