Vitamins and minerals, aka micronutrients, do not provide energy, but are key players in energy production and other body functions needed for optimal performance. Thus far, there are no specific intake recommendations for athletes, although athletes at risk for a deficiency may need additional supplementation. While vitamins do not enhance performance, a deficiency can lead to poor performance. Keep in mind, though this is an article about athletes, the functions and Daily Recommended Intakes apply to the general population. You may not need to perform on the court or the field, but rather at your workplace or at home. Here are the top 5 micronutrients, and how they play a role in the body.