Effectively delivering evidence-based guidelines translated into practical information for athletes is critical for improving their health and performance. The sixth edition of Sports Nutrition: A Handbook for Professionals is a joint venture between the Acad- emy of Nutrition and Dietetics and the Sports, Cardiovascular, and Wellness Nutrition (SCAN) dietetic practice group. All six editions of this manual have involved SCAN registered dietitian nutritionists, and this edition offers even more chapters written or reviewed by SCAN registered dietitian nutritionists. We are pleased with the changes to the sixth edition and hope that you will find this updated edition useful.