This article introduces a recently increasing disorder, Orthorexia Nervosa(ON), reviews the current literature about its clinical features and diagnostic criteria, and suggests future directions for research. ON is a condition characterized by excessive fixation on eating healthy food, such that it dominates one’s life. These consequences reflect in ON being considered a psychosocial disorder that results in underweight or unbalanced physical states. ON is usually considered similar to anorexia nervosa(AN) or obsessive compulsive disorders (OCD). In this review, the clinical features of ON are compared to AN and OCD, focusing on their similarities and differences. As there are no agreed formal diagnostic criteria, this review further introduces recently proposed criteria and controversies regarding the diagnosis. In particular, it criticizes ORTO-15, the most widely used instrument prevalent, and suggests considerations for future research.
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