A supplement is any product that delivers nutrients to the body in addition to those supplied by food. A balanced diet is sufficient for most people, but many athletes take supplements to improve their training results and athletic performance. Popular safe supplements include multivitamins to correct nutritional deficiencies and products containing protein, creatine or glutamine to increase muscle strength and size and to enhance performance. Learn about safe and effective supplements by following advice from today’s top experts and nutritionists.
