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Orthorexia nervosa (ON), an atypical eating disorder characterized as an almost monomaniacal obsession for “healthy eating,” leads to clinical concerns when the patient's zealous preoccupation with avoiding impurities, processed foods, additives, and imagined contaminants results in micronutrient and macronutrient deficiencies, malnutrition, inadvertent weight loss at times, and overall social impairments. Although diagnostic criteria have been proposed, the disorder is not currently recognized in DSM-5 or the International Classification of Diseases. Investigating the prevalence of ON among youth, investigators screened 454 Spanish university students (295 women; mean age, 20; average body-mass index [BMI], 22) with a validated questionnai…