Binge-Eating Disorder (BED) and Avoidant/Restrictive Food Intake Disorder (ARFID) represent distinct eating disorder phenotypes that lack the compensatory purging behaviors of bulimia. Binge-Eating Disorder (BED)—the most prevalent eating disorder globally—involves recurrent episodes of consuming large amounts of food rapidly past physical fullness in the absence of hunger, accompanied by profound feelings of self-disgust, depression, and guilt, without compensatory purging. In contrast, ARFID is characterized by persistent failure to meet nutritional or energy needs driven not by body image concerns or weight fears, but by three distinct clinical drivers: apparent lack of interest in eating, sensory sensitivity to food characteristics (texture, smell, color), or conditioned fear of aversive consequences (choking, vomiting, gastrointestinal pain). The Binge-Eating Disorder and ARFID Psychoeducation Module delivers 20 structured video lessons covering dopamine reward circuitry, ARFID sensory ladders, and stimulus exposure.
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Binge-Eating Disorder: The Dopamine Hijack
BED is characterized by altered striatal dopamine D2 receptor availability and prefrontal inhibitory deficits. Ultra-processed foods engineered with high fat-sugar combinations activate opioid and dopamine reward circuits far more powerfully than natural foods. Emotional bingeing operates as a maladaptive affect regulation mechanism to temporarily numb painful emotions, which then fuels profound shame and further binge episodes.
The 3 Subtypes of ARFID
- Sensory Sensitivity: Extreme aversion to specific textures (pureed, crunchy), temperatures, or odors; common in autistic and neurodivergent individuals.
- Fear of Aversive Consequences: Acute food avoidance triggered by a traumatic choking episode, allergic reaction, or severe vomiting.
- Low Appetite / Lack of Interest: Forgetting to eat, feeling full after two bites, viewing food consumption as an exhausting chore.
Treatment applies Sensory Food Ladders: systematic, hierarchical desensitization (looking → touching → smelling → licking → chewing/swallowing) without coercion.
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