Most of us have heard of the eating disorder anorexia. Not as familiar is the term orthorexia, which is characterized by an obsession with proper nutrition, food quality and healthy eating. For someone fixated on "clean eating" avoidance of what they perceive as "unhealthy" food can result in the development of extreme, restrictive diets. While orthorexia is not yet recognized as a clinical diagnosis, Dr. Rebecca Sokal and Dr. Yon Park say more research is needed. Sokal and Park are fourth year