The document discusses dietary supplements used by athletes. It defines dietary supplements as products intended to supplement the diet that contain vitamins, minerals, herbs, or other ingredients. It provides statistics on common supplements used by NCAA athletes and lists the variety of supplements available at a sports training center in India. The rest of the document discusses the roles and recommendations for various macro/micronutrients and other ingredients in athletic performance and recovery, including carbohydrates, protein, amino acids, creatine, vitamins, minerals, and herbs.