Orthorexia Test (ONI)

Orthorexia nervosa refers to an unhealthy obsession with eating healthy, clean, or pure food. While paying attention to nutrition is generally beneficial, orthorexic tendency occurs when dietary rules become so rigid and demanding that they cause psychological distress, physical harm, or social isolation. Rather than focusing primarily on body weight or thinness—as in anorexia or bulimia—orthorexia is driven by a fixation on food quality, purity, and strict dietary control. To better capture this pattern, researchers Crystal D. Oberle, Alessandro S. De Nadai, and Acquilla L. Madrid developed the Orthorexia Nervosa Inventory (ONI) in 2020. The ONI was created to provide a modern, psychometrically sound measure capable of distinguishing healthy enthusiasm for wellness from distressing food fixations.

This assessment measures orthorexic tendency across four key facets: Behaviours, Physical Impairment, Social Impairment, and Emotions. The Behaviours facet examines the daily habits and rigid rules surrounding food, such as compulsively checking nutrition labels, eliminating entire food groups, or spending excessive time planning meals. Physical Impairment reflects the bodily consequences that can arise when a diet becomes severely restrictive, including fatigue, faintness, nutritional deficiencies, or gastrointestinal distress caused by frequent fasts or cleanses. Social Impairment evaluates how deeply dietary rules interfere with relationships and leisure, such as avoiding family meals, becoming distracted during social gatherings by thoughts of food, or experiencing conflict with loved ones over eating habits. Finally, the Emotions facet captures the psychological toll of orthorexia, specifically the intense guilt, self-loathing, or sense of personal failure that occurs when breaking a dietary rule.

Psychological research into orthorexia highlights that the condition exists along a spectrum, ranging from mild dietary preference to an all-consuming pattern of rigid control. Studies utilizing the Orthorexia Nervosa Inventory show that higher orthorexic tendency is frequently associated with elevated anxiety, obsessive-compulsive traits, and perfectionism. People who score high in orthorexic tendency often experience a high degree of cognitive load, devoting hours each day to analyzing food purity or worrying about potential contamination. Research also demonstrates that severe restriction can paradoxically compromise physical health, leading to malnutrition or physical symptoms despite the individual's intention to achieve optimal wellness. Understanding these dynamics helps clarify how an initial desire for vitality can gradually turn into a source of chronic distress.

The four facet scores are summarized to provide an overall profile of your orthorexic tendency. Alongside your results, the chart displays estimated comparison markers from published research samples using the ONI. These markers represent rescaled population estimates rather than validated percentile norms or diagnostic thresholds for this specific online assessment. As such, they should be interpreted as a general point of reference to help you understand how your self-reported habits compare to broad averages, rather than a definitive ranking of your health.

This test is provided for educational and entertainment purposes only. It is not a clinical or diagnostic instrument and cannot diagnose orthorexia nervosa or any other eating disorder. A high score indicates a strong self-reported alignment with orthorexic tendencies, but only a qualified health professional can evaluate your symptoms in the full context of your life. This assessment is based on the Orthorexia Nervosa Inventory (ONI) but is not affiliated with C. D. Oberle, A. S. De Nadai, A. L. Madrid, or their academic institutions. If your relationship with food is causing you distress or affecting your health, consider reaching out to a healthcare provider or nutritional specialist for guidance.

References

• Oberle, C. D., De Nadai, A. S., & Madrid, A. L. (2020). Orthorexia Nervosa Inventory (ONI): development and validation of a new measure of orthorexic symptomatology. Eating and Weight Disorders - Studies on Anorexia, Bulimia and Obesity, 26(2), 609-622.