Athletes need more than just a multivitamin or mineral supplement to improve and maintain fitness levels. Well-researched ingredients for performance nutrition can help athletes grow bigger, faster and stronger. Takeaways include: *Sports nutrition ingredients can prepare the body for action, as well as help it reach and maintain peak performance. *Effective sports ingredients should increase muscle mass and/or performance, or decrease fat mass. *Caffeine and creatine have been used extensively, but beta-alanine and beetroot are edging out the competition.