Disordered eating in student-athletes includes a wide range of eating concerns. These range from the athlete who inadvertently is not eating enough to fuel her/his body for sport simply out of not realizing how high her/his caloric needs are, all the way to the extreme of a full blown eating disorder and associated complications. Eating disorders include anorexia nervosa (being significantly underweight with distorted body image and intense fear of gaining weight) and bulimia nervosa (recurrent episodes of binging and purging; purging may involve use of excessive exercise beyond that recommended by coaches in order to compensate for food eaten). Athletes may underfuel because of wanting to try to achieve a competitive advantage in sport, meet appearance standards for sport or for society, or for other reasons. Ultimately, underfueling is not a sustainable way to achieve success in sport, and athletic performance will suffer if disordered eating continues. Young athletes may find themselves on a slippery slope in which a desire to “eat healthy” turns into food restriction and rigid dieting in the hopes of improving athletic performance.