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Orthorexia, or orthorexia nervosa is a term coined by Dr. Steven Bratman, a Colorado MD, to denote an eating disorder characterized by a fixation on eating what the sufferer considers to be healthful food, which can ultimately lead to early death.
Bratman coined the term in 1997 from the Greek orthos, "correct or right", and orexis for "appetite". Literally "correct appetite", the word is modeled on anorexia, "without appetite", as used in definition of the condition anorexia nervosa. Bratman describes orthorexia as an unhealthy obsession (as in obsessive-compulsive disorder) with what the sufferer considers to be healthy eating. The subject may avoid certain foods, such as those containing fats, preservatives, or animal products, and suffer malnutrition. Dr. Bratman asserts that "emaciation is common among followers of health food diets."
According to the Macmillan English Dictionary, the word is entering the English lexicon., and although the condition is not listed in the DSM-IV, it is used as a diagnosis by some practitioners who have documented the damaging results of the condition, as they have seen in their practices.
Additional recommended knowledge
As of January 2007, two peer-reviewed studies have been published on the condition.   In the studies, Donini et al define orthorexia nervosa as a "maniacal obsession for healthy foods" and propose several diagnostic criteria. Sufferers of orthorexia often display symptoms consistent with obsessive-compulsive disorder and have an exaggerated concern with healthy eating patterns. A diagnostic questionnaire has been developed for orthorexia sufferers, similar to questionnaires for other eating disorders. Dr. Bratman proposes an initial self-test composed of two direct questions: "Do you care more about the virtue of what you eat than the pleasure you receive from eating it?... Does your diet socially isolate you?" 
Symptoms and Theory
Symptoms of orthorexia nervosa may include obsession with healthy eating, emaciation, and death by starvation. Orthorexic subjects typically have specific feelings towards different types of food. Preserved products are described as "dangerous", industrially produced products as "artificial", and biological products as "healthy". Sufferers demonstrate a strong or uncontrollable desire to eat when feeling nervous, excited, happy or guilty. According to the abstract of a 2004 study quoted on PubMed, a service of the National Institutes of Health, "The analysis of the physiological characteristics, the social-cultural and the psychological behaviour that characterises subjects suffering from ON shows a higher prevalence in men and in those with a lower level of education."
Biology of orthorexia nervosa
There has been no investigation into whether there may be a biological cause specific to orthorexia nervosa. However, Donini et al link orthorexia to a food-centered manifestation of obsessive compulsive disorder, which is thought to have specific biological causes.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Orthorexia_nervosa". A list of authors is available in Wikipedia.|