Food is the best supplement
If you have a vitamin or mineral deficiency that is impairing your performance, a supplement may correct that problem. Taking a single one-a-day multi-vitamin/mineral supplement as “health insurance” is an easy and inexpensive way to ease your mind if you eat poorly from time to time. However, despite claims to the contrary, supplements will not enhance performance, increase strength or endurance, provide energy or build muscles. As lackluster as it may sound, plain old carbohydrate is still the best energy enhancer on the market, and that is not likely to change. For optimal performance, eat a balanced diet of whole grains, fruits, vegetables, lean meats and low-fat dairy products. There is no supplement that can substitute for the real thing.