Autism and Eating Disorders: Understanding the Connection

When people think about autism and food, they often think about picky eating, sensory sensitivities, or strong food preferences. While these experiences are common among autistic individuals, it is important to recognise that not all food-related difficulties are eating disorders.

However, research over the past decade has revealed a significant and important relationship between autism and certain eating disorders, particularly anorexia nervosa. As our understanding of autism continues to grow, clinicians and researchers are increasingly recognising that autistic people may experience eating disorders differently and may require tailored support.

Food Difficulties Are Not Always Eating Disorders

Many autistic people have a complex relationship with food that is not driven by body image concerns or a desire to lose weight.

For example, autistic individuals may:

• Avoid certain foods because of their texture, smell, taste, or appearance.

• Prefer predictable meals and become distressed when familiar foods are unavailable.

• Experience anxiety around trying new foods.

• Have strong routines surrounding eating times, food preparation, or presentation.

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These experiences are often linked to sensory processing differences, anxiety, need for predictability, and routine rather than an eating disorder.

This distinction is important because food-related challenges in autism can sometimes be misunderstood or misdiagnosed.

What Is the Link Between Autism and Eating Disorders?

In recent years, researchers have identified a strong association between autism and eating disorders, particularly anorexia nervosa. Studies have found that between 20% and 40% of people with anorexia may also be autistic, a figure far higher than autism prevalence within the general population. Other research has estimated that approximately 23% of individuals with anorexia meet criteria for autism.

Research has also found elevated autistic traits among people with bulimia nervosa, binge eating disorder, and Avoidant Restrictive Food Intake Disorder (ARFID).

Increasingly, experts believe that autism may be an important risk factor for developing certain eating disorders, particularly when autistic characteristics interact with anxiety, perfectionism, social difficulties, and sensory differences.

Why Might Autistic People Be More Vulnerable?

There is no single explanation for the relationship between autism and eating disorders. Instead, researchers believe several factors may contribute.

Sensory Sensitivities

Many autistic individuals experience heightened sensitivity to taste, texture, smell, temperature, or appearance of food. Certain foods may feel overwhelming or even unbearable to eat.

Over time, these sensitivities can result in a very restricted diet and, in some cases, may contribute to the development of disorders such as ARFID.

Preference for Routine and Predictability

Autistic people often find comfort in routines and predictability. Eating the same foods, at the same times, in the same way can provide a sense of safety and control.

While routines themselves are not problematic, rigid eating patterns can sometimes become increasingly restrictive and difficult to change.

Anxiety and Need for Control

Anxiety is common among autistic individuals. For some people, controlling food intake can become a way of managing feelings of uncertainty, stress, or overwhelm.

Researchers have noted similarities between autism and anorexia in areas such as cognitive rigidity, perfectionism, and difficulties adapting to change.

Social and Emotional Challenges

Some autistic people find it difficult to identify, understand, or communicate their emotions. Eating behaviours can sometimes become a way of coping with emotional distress that feels difficult to express verbally.

Experiences such as bullying, social isolation, masking autistic traits, or struggling to fit into a predominantly neurotypical world may also contribute to mental health difficulties that increase vulnerability to eating disorders.

Autism, ARFID and Eating Disorders

One eating disorder that has received growing attention within autism research is Avoidant Restrictive Food Intake Disorder (ARFID).

Unlike anorexia nervosa, ARFID is not driven by concerns about body shape or weight. Instead, food restriction may occur because of sensory sensitivities, fear of choking or vomiting, or a lack of interest in eating.

Research suggests there is substantial overlap between autism and ARFID. A recent meta-analysis found that around 16% of individuals with ARFID were autistic, while ARFID was also more common among autistic populations than in the general population.

Because many autistic people already experience sensory-related food difficulties, understanding the difference between autism-related eating differences and ARFID is essential for providing appropriate support.

Challenges in Diagnosis

Autism can sometimes be overlooked in eating disorder services, particularly among girls and women.

Historically, autism has been under-recognised in females, and some autistic individuals may not receive a diagnosis until adulthood. Researchers have found that a significant number of young women entering eating disorder treatment were later identified as autistic.

This matters because traditional eating disorder treatments may not always meet the needs of autistic people. Increasingly, specialist services are developing autism-informed approaches that recognise sensory differences, communication styles, and the importance of predictability and routine during treatment.

A Growing Understanding

The relationship between autism and eating disorders is complex, and researchers are still working to understand exactly why these conditions overlap so frequently.

What is clear is that autistic people may experience eating disorders differently from non-autistic individuals. Food restriction may be influenced by sensory sensitivities, anxiety, routines, and cognitive differences, as well as, or instead of, concerns about weight and appearance.

As awareness continues to grow, there is increasing recognition that autistic individuals benefit from support that understands both autism and eating disorders together, rather than viewing them as separate issues.

Final Thoughts

Food-related challenges are common in autism, but not every food difficulty is an eating disorder. At the same time, eating disorders are significantly more common among autistic people than previously recognised.

By understanding the unique ways autism can influence eating behaviours, families, clinicians, and support services can provide more compassionate, effective, and personalised support.

If you are concerned about your own eating habits or those of someone you support, it is important to seek advice from a qualified healthcare professional. At Aspect Autism we have clinicians who have many years of experience working with individuals with eating disorders. Early intervention can make a significant difference and help ensure that both autism-related needs and eating disorder symptoms are properly understood.