Autism and Eating Disorders: Understanding the Overlap and Creating Inclusive Support

Eating disorders occur at significantly higher rates among autistic individuals compared to the general population – a reality that is too often overlooked or misunderstood. This overlap is not incidental; it reflects a complex interaction of sensory sensitivities, routines, social pressures, and co-occurring mental health challenges. Recognizing the connection between autism and eating disorders matters for clinicians, families, and most importantly, for autistic people themselves. Many autistic people with eating disorders face challenges with diagnosis and treatment because their particular needs are often not understood or addressed.

When autism and eating disorders co-occur, treatment may be less effective, and clinical outcomes may be worse. The result is that autistic individuals often report poorer eating disorder treatment experiences.

The path forward requires autism-affirming, trauma-informed, and neurodiversity-informed care. This approach to treatment recognizes that autism is a natural form of human diversity rather than a deficit to be corrected. This blog intentionally uses identity-first language (“autistic individuals”) as preferred by many in the autistic community, while acknowledging that language preferences are personal and vary among individuals. Respect for individual choice remains essential.

The Link Between Autism and Eating Disorders

Autism prevalence in the general population is about 1%. The prevalence of autism in eating disorder populations, however, is much higher. And the relationship is bidirectional: the prevalence of eating disorders is higher in autistic populations. This overlap is clinically significant as many individuals are first identified in eating disorder services, not in services for autism. Autism may be missed, leading to misinterpretation of behaviors and poorer outcomes with standard treatments.

Prevalence and Overlap: Key Statistics

In sharp contrast to the general population, studies show that approximately 20-30% of people with eating disorders also have autism, with the highest co-occurrence in anorexia nervosa and avoidant/restrictive food intake disorder (ARFID).

One meta-analysis found that 16% of individuals with ARFID have an autism diagnosis. This  analysis also reported that 11% of autistic individuals have ARFID. (Sader et al., 2025).

Other individual studies have reported even higher rates of autism: of children diagnosed with AFRID, 8-55% are also autistic. (Keski-Rahkonen and Ruusunen, 2023).

The connection between autism and eating disorders is particularly strong in individuals diagnosed with anorexia nervosa. Research indicates that 29% of people with anorexia scored above the clinical threshold for autism spectrum disorder when assessed using standard diagnostic tools. (Inal-Kaleli et al., 2024). This is a dramatic increase compared to the prevalence of autism in the general population.

Traits Shared by Autism and Eating Disorders

Autism and eating disorders share several overlapping characteristics that influence eating behaviors and treatment response. Some of which include, but are not limited to:

• Cognitive inflexibility
• Need for routines
• Sensory sensitivities
• Repetitive behaviors
• Executive functioning challenges

These differences can shape how autistic individuals relate to food and respond to standard eating disorder interventions.

When an autistic person develops rigid rules around food – whether related to “safe” foods, calorie limits, or eating rituals – these rules can become deeply entrenched and resistant to change. If these routines become overly restrictive or rigid, they can contribute to nutritional inadequacy or lead to an eating disorder.

Standard eating disorder treatment settings, often involving unfamiliar foods or group meals in busy clinical environments, may be particularly challenging for autistic individuals with sensory sensitivities.

Autism-related Feeding Behaviors vs. Eating Disorders

The distinction between autism-related food rituals and eating disorder rituals can be clinically challenging. Both may involve rigid rules around eating, but they may serve different functions and require different interventions.

Autistic adults report executive function challenges that affect their ability to plan meals, shop for groceries, prepare food, and maintain regular eating patterns. Yet standard treatments may not accommodate these cognitive differences. With appropriate adaptations, autistic individuals can achieve similar recovery, though they may need different paths to get there.

Types of Eating Disorders Seen in Autistic Individuals

Anorexia nervosa and ARFID represent the two eating disorders most commonly associated with autism. More than one-quarter of individuals with acute anorexia nervosa also have autism, which is much higher compared to the general population. The same cognitive inflexibility that characterizes autism can lead to rigid rules about food, calorie counting, or exercise. Some autistic individuals develop anorexia nervosa through sensory-based food avoidance that leads to more generalized food restriction.

ARFID is especially relevant to autism due to the central role of sensory and interoceptive factors in both conditions. ARFID stems from sensory-based avoidance, fear-based food restriction, and lack of interest in eating – characteristics that are all present in autistic populations. The same sensory processing differences that lead to food selectivity in autism can become severe enough to meet ARFID criteria when they result in nutritional deficiency, weight loss, dependence on supplements, or psychosocial impairment.

Interoception, or the awareness of one’s own internal states, may be altered in autism. This can lead to a failure to recognize hunger, difficulty distinguishing hunger from other sensations such as anxiety, or a tendency to overeat because fullness signals are not recognized.

Why Eating Disorders Are More Common in Autistic Individuals

Autism is not the “cause” of eating disorders. Multiple factors such as neurological differences, emotional experiences, and the environment in which autistic people live, create increased vulnerability to eating disorders. Sensory processing differences are not preferences or choices. They reflect genuine neurological differences in how sensory information is processed. When individuals struggle to recognize, understand, or regulate their emotions, eating behaviors may become a way to manage overwhelming internal experiences. Autistic people navigate environments that were often not designed for their neurological differences. Eating behaviors may be one area where they can feel in control.

Sensory Processing Differences

For many autistic individuals, certain food textures (such as slimy, mushy or crunchy) or a mixture of different foods can trigger intense and aversive responses. Taste processing differences in autism are complex and varied. Some autistic people experience taste more intensely than neurotypical individuals, while others may have reduced taste sensitivity. Many autistic individuals report being overwhelmed by food smells, including the smell of foods being eaten by others. This can make shared mealtimes difficult and may lead to avoidance of environments where particular foods are present. The smell of a food can trigger rejection before the food is even tasted or touched. Some autistic individuals have strong preferences for foods at specific temperatures and may reject foods when they expect them to be a different temperature.

The sensory environment surrounding mealtimes can compound the challenges of eating. Visual stimulation from bright lights, busy patterns on plates or tablecloths, or the appearance of multiple foods touching each other can be overwhelming. Auditory input during meals, including conversation, background music, and the sounds of others chewing can create sensory overload that makes it difficult to focus on eating. The expectation to make conversation, maintain eye contact, follow social rules about eating, and manage the sensory input from other people often leads to exhaustion.

Food selectivity is one of the most common challenges in eating for autistic individuals. They may rely on a small number of “safe” foods that are familiar, predictable, and do not trigger sensory aversions. These safe foods become anchors in an otherwise overwhelming sensory world. Autistic individuals may develop “food jags” in which they rely solely on the same food for meals. This limited diet can contribute to significant nutritional deficiencies.

Cognitive Inflexibility and Executive Function

Autistic individuals often find comfort in predictable systems. Rigid thinking patterns around food can evolve into entrenched behaviors that become increasingly difficult to modify. Executive function includes the ability to override established eating patterns. But in autistic individuals, once a pattern is established, it is difficult to shift to a different mindset. Rules involving food become deeply embedded and persist, even when causing harm.

Focused Interests and Food Preoccupation

Restricted or intense interests are a core trait of autism, and can center on nutrition, exercise or body metrics. When these focused interests intersect with food and body-related topics, the same cognitive traits that make autistic individuals passionate learners can lead to restrictive eating patterns and increased vulnerability to developing an eating disorder.

Masking, Stimming, and Social Pressures

Masking, or social camouflaging, refers to the conscious or unconscious effort to hide autistic traits and appear “neurotypical.” This can include:

• Rehearsing conversations or copying others’ social behaviors

• Suppressing natural responses (such as stimming or avoiding eye contact)

• Forcing oneself to follow social rules that don’t feel intuitive

While masking can help someone navigate social situations, it often comes at a cost. Higher levels of social camouflaging may lead to a delayed autism diagnosis and predict increased eating disorder symptoms. Without an understanding of their autism, individuals lack access to accommodations and strategies that would prevent the development of maladaptive coping mechanisms, including disordered eating.

Stimming, or self-stimulatory behaviors such as hand-flapping, rocking, or repetitive movements, serves as a crucial self-regulatory mechanism for autistic individuals. The repetitive behaviors help an autistic individual communicate intense emotions and cope with overwhelming sensory environments. Clinicians in treatment settings may misinterpret stimming behaviors, failing to recognize their regulatory function. Clinicians must understand that stimming is functional. While they should seek to reduce environmental triggers that increase the need for stimming, clinicians should also be careful not to encourage the suppression of a natural response.

Eating Disorder Diagnosis in Autistic Individuals

Diagnosing eating disorders in autistic individuals may be more complex because many autistic traits, such as restrictive eating, preference for routines, and food rules, may overlap with eating disorder symptoms. Clinicians may attribute all eating difficulties to autism and miss the development of a distinct eating disorder. Autistic individuals may have difficulty describing how they feel, and masking may make eating disorder symptoms less visible.

Sensory-Driven vs. Body Image-Driven Restriction

Dietary restriction in ARFID is not motivated by body image concerns but is based on sensitivity to sensory aspects of food, lack of interest in food, and/or fear of aversive consequences of food intake. Sensory sensitivities are the most commonly reported driver of food restriction in autistic individuals with ARFID and other restrictive eating patterns.

Co-Occurring Conditions

Autistic individuals with eating disorders frequently present with multiple psychiatric comorbidities, including ADHD, anxiety disorders, depression, PTSD, and elevated suicide risk. About 70% of individuals with autism spectrum disorder may have one comorbid mental disorder, and 40% may have two or more comorbid mental disorders. Understanding these co-occurring conditions is essential for comprehensive assessment and treatment planning.

Treatment Approaches for Autistic Individuals with Eating Disorders

Effective treatment for autistic individuals with eating disorders requires thoughtful adaptations to standard treatment approaches. Modifications to communication styles, sensory accommodations and individualized pacing are all ways that clinicians can better serve autistic patients.

Trauma-Informed and Neurodiversity-Affirming Care

Treatment for autistic individuals with eating disorders should not aim to “reduce” autism, but rather support autistic needs while addressing the eating disorder. A trauma-informed approach highlights safety, trust and respect for a neurodivergent identity. Neurodiversity-affirming principals recognize autism as a neurodevelopmental condition associated with different strengths and challenges. The goal of treatment should be to improve function and well-being, and requires clinicians to create a safe environment that is open to choice and collaboration in treatment planning.

Adapting Evidence-Based Treatments

Standard evidence-based treatments for eating disorders such as cognitive behavioral therapy (CBT), dialectical behavioral therapy (DBT), and family-based treatment (FBT) can be effective for autistic individuals when thoughtfully modified to accommodate sensory processing differences, communication styles and cognitive profiles.

CBT can be adapted to include visual support strategies (such as visual cues and diagrams) and the use of concrete language for clear communication. CBT sessions should follow a structured, predictable routine with clear agendas and expectations. There should be a focus on behavioral components such as exposure-based interventions. Treatment duration may need to be lengthened to accommodate for slower processing speed or the need for repetition.

DBT’s structured format and concrete skills can be useful, but also overwhelming. Condensed versions of the standard DBT materials with visual cues and a less intensive format may improve accessibility for autistic individuals. Demonstrating skills, in addition to just describing them, and adjusting the group environment to decrease sensory overload may also be useful modifications.

Clinicians using DBT should gradually introduce new foods with attention to texture and temperature, and allow extra time for processing. Autistic individuals may benefit from written agendas or materials to supplement verbal content, as well as from explicit preparation for transitions among the treatment phases.

Professional and Family Resources

When seeking treatment providers, families and referring professionals should look for clinicians who demonstrate understanding of both eating disorders and autism.

Neurodiversity-affirming providers recognize autistic individuals as partners in the treatment planning process and acknowledge the need to adapt standard eating disorder treatment. Clinicians should respect differences in sensory processing and communication styles, understand the difference between autism-related eating patterns and eating disorder pathology, and be willing to modify treatment as appropriate.

Conclusion: Moving Toward Inclusive and Effective Support

The high co-occurrence of autism and eating disorders represents both a challenge and an opportunity for eating disorder treatment to evolve. It is imperative that clinicians understand that factors such as sensory processing differences, preference for routines, and challenges with cognitive flexibility require thoughtful adaptation of treatment. Individualized, trauma-informed care that focuses on principles such as safety, trust, collaboration, and empowerment must guide our treatment. Despite the challenges, autistic individuals can, and do recover from eating disorders.

With appropriate support, understanding, and accommodation, recovery is attainable – without requiring autistic individuals to suppress their authentic selves. Clinicians, families, and autistic individuals can all work together toward healing while respecting the whole person.