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Orthorexia, or orthorexia nervosa is an unhealthy obsession with (what the sufferer considers to be) healthy eating. The subject may avoid certain types of food, such as those containing fats, preservatives or animal products. It is closely related to anorexia nervosa.
The condition was identified by Dr. Steven Bratman, a Colorado specialist. Bratman coined the term for the condition in 1997 from the Greek orthos, "correct or right", and orexis for "appetite".1 Though the word is entering the English lexicon, the psychiatric community has not yet officially recognized the condition.
A first scientific study for this rather new disorder was published in 20042.