Autism and Eating Disorders: A Common Overlap That Treatment Was Not Built For

Autistic people are markedly over-represented among people with eating disorders. Around a quarter of people treated for anorexia show strong autistic characteristics, and avoidant/restrictive food intake disorder (ARFID), often driven by sensory differences, is common among autistic children. Yet eating-disorder treatment was largely built without autistic people in mind, and the evidence so far suggests it is working less well for them.

Behind those findings are patterns autistic people and families often describe. It is the teenager whose restricted eating began not with any wish to change her body but with the texture, smell or unpredictability of food, and who was then treated as if it were about her body. It is the young woman who spends years in anorexia services before anyone asks whether she is autistic. It is the parent told that a child's narrowing diet is just fussiness. Too often, this happens because services were not built to look for autism.

Around a quarter of people treated for anorexia show marked autistic characteristics

A 2013 systematic review by Huke and colleagues put the average estimated prevalence of autism in eating-disorder populations at 23%. But six of its eight studies came from one Swedish cohort, where estimates ranged from 8% to 37% depending on the assessment used^[4]. In one sample of 40 adolescents with anorexia, 52.5% scored above the cut-off on the ADOS-2 observation assessment, but only 10% also did so on a parent-reported developmental interview^[4].

The most recent meta-analysis, from 2025, found that 29% of people with anorexia scored above the ADOS cut-off^[1]. At one specialist adult service in London, 29.3% of 731 patients scored above the cut-off on the AQ-10 screening questionnaire, from 16.7% in binge eating disorder to 40.0% in ARFID^[5]. Recorded diagnoses are far lower: in a Swedish study of 3,189 people with current or past anorexia, 4.2% had a registered autism diagnosis^[6].

National registers show the link is not just a quirk of clinic samples. In Finland, people born 1991–2001 who had been diagnosed with anorexia had 6.6 times the odds of an autism diagnosis compared with population controls. For other or unspecified eating disorders it was 9.1 times the odds, and 32.4 times among males in that group, an imprecise estimate^[7].

But starvation can affect thinking and social functioning^[2], so some autistic-seeming traits may appear during acute illness. A Swedish twin study of 5,987 people found no raised autistic traits at age 9 in children later diagnosed with anorexia. At 18, restricted and repetitive behaviours were markedly raised, but only in those who were acutely unwell. The authors say this may reflect how autistic girls cope and present, or may mean the traits were not there before^[8]. Either way, people whose autism was missed deserve recognition, and people whose traits come from starvation deserve not to be misdiagnosed.

Eating disorders are more common among autistic people, and girls may be treated before their autism is recognised

In Denmark, 2.57% of autistic people had been diagnosed with an eating disorder, against 0.91% of non-autistic people, and risk was raised in both directions: eating disorders after an autism diagnosis, and autism after an eating disorder. The authors caution that the order is hard to read. In girls, autism is often diagnosed only in adolescence, and some autism may be detected only when someone is assessed for an eating disorder^[2].

For some autistic girls and women, the eating disorder is noticed years before the autism. In a Swedish national cohort of 72,331 people later diagnosed as autistic, 2.1% of females had an anorexia diagnosis recorded before their autism diagnosis, compared with 0.2% of males^[9]. In a small UK interview study, autistic women had on average been diagnosed with anorexia at about 17 and with autism at about 29^[10]. Our article on autistic women and girls covers late diagnosis.

Autistic traits may also come first. In England's Avon Longitudinal Study of Parents and Children, 14-year-olds with disordered eating had scores about 20% higher on a mother-rated measure of autistic social traits through childhood (relative risk 1.23). The authors say these traits "could represent a risk factor"^[11].

Different designs, ages and measures: not directly comparable.

ARFID is where sensory differences show most clearly

ARFID means extensive avoidance or restriction of food^[13], without the body-shape concerns typical of anorexia^[10]. A 2022 review of 56 studies found ARFID-like presentations common in autistic children and young people, "with severe consequences for physical and mental health". Of the three recognised drivers (sensory-based avoidance, fear-based restriction and low interest in eating), "sensory sensitivities are currently the most commonly described"^[14].

A 2025 meta-analysis found autism diagnoses in 16.3% of people with ARFID (18 studies). ARFID in autistic groups was estimated at 11.4%, but from only three studies, with a confidence interval of 2.9% to 35.8%, and there was too little data to compare with non-autistic groups^[13]. The SPARK estimate is higher, and its authors suggest ARFID is under-diagnosed^[3]. In Norway's MoBa cohort, children whose mother-reported avoidant/restrictive eating persisted from age 3 to 8 had an autism diagnosis in 5.50% of cases, against 1.70% of children without that eating pattern^[12].

NHS England's 2026 guidance for children's services says autistic young people "may be more likely than non-autistic peers to present with disordered eating behaviours such as those linked to food textures, sensory experiences, and/or trauma", and asks local health systems to develop ARFID pathways^[15]. Restricted diets also overlap with gut symptoms: see our article on gut health.

Same behaviours, different reasons: what research says links the two

Restrictive eating in autistic people can look like anorexia while being driven by something else: "Same behaviours, different reasons" is the title of a 2019 study in which women with anorexia who were autistic or had high autistic traits described needs "not being met by standard ED treatments"^[16]. In 44 UK interviews with autistic women, parents and clinicians, the themes were sensory sensitivities, social relationships, identity, emotions, thinking styles, and a need for control and predictability. Restriction often "seemed to be driven by other factors, such as food-specific sensory sensitivities, a desire to avoid certain bodily sensations, or an absence of hunger signals"^[10]. As one woman put it: "For me, the anorexia is just a symptom, and the cause is the autism." A 2025 synthesis of nine qualitative studies found these autism-related mechanisms "are not consistently acknowledged and addressed in current care provision"^[17].

• Sensory processing: across 25 studies, consistent links to eating behaviours in autism, with early evidence for taste and smell sensitivity^[18].
• Eating difficulties not about weight or shape: among 196 autistic and 206 non-autistic adults, these were linked to eating-disorder symptoms only in the autistic group, while body image mattered equally in both^[19].
• Anxiety: in the Avon cohort, higher autistic traits at 7 were associated with more emotional and restrained eating at 13, partly through anxiety at 10^[20]. In Denmark, the authors estimate that intervening mood or anxiety disorders could account for 44% to 100% of the autism/ADHD–eating disorder links^[2]. That is a statistical pathway, not proof of cause. See our article on anxiety.
• Masking: among 180 autistic adults, camouflaging predicted eating-disorder symptoms; sensory profiles did not^[21].
• Interoception: autistic women describe difficulty sensing hunger and fullness^[10], but a laboratory study found no link between heartbeat-sensing accuracy and autistic traits in anorexia^[22]. The evidence is thin.

Standard treatment is working less well for autistic people

In the Swedish study of 3,189 people with anorexia, those with a registered autism diagnosis had more severe illness on 27 of 29 indicators. Almost half had ever been admitted to hospital for anorexia (46% vs 23%). Their mean inpatient time for anorexia was about 122 days, against about 28, and 9.7% had received tube feeding, against 2.0%. At least one suicide attempt was documented for 42% of autistic participants, against 12%^[6]. That does not mean suicide follows from being autistic. It is a sign of how much distress can build when needs go unmet, and of why services must act. Support helps, and people do recover; our article on suicide prevention research goes further.

A Gothenburg study followed 51 people with adolescent-onset anorexia and 51 controls for 30 years. Core eating-disorder symptoms came level with controls, "but the positive outcomes were limited to those who had never had an ASD diagnosis"^[23]. A 2025 systematic review found autistic people report poorer treatment experiences and may face more and longer admissions, though symptom improvements were similar; it questioned how well group and cognitive programmes fit^[24]. In a UK survey, 46 autistic women with restrictive eating disorders rated inpatient care, dietetic input and cognitive behavioural therapy as significantly less helpful than 110 non-autistic women did^[25]. In Sydney, autistic young people and parents described being "misunderstood" in eight ways, from "neuro-normative definitions of eating and recovery" to "a one size fits all approach", with distress, mistrust and setbacks in recovery^[26].

Recognition is its own problem. At the London service, only 6.1% of 1,252 patients reported known or suspected autism at intake^[27], while 29.3% of the 731 with a confirmed eating-disorder diagnosis screened above the autism cut-off^[5]. A screen is not a diagnosis, but the gap suggests many autistic patients go unrecognised. NICE's eating-disorders guideline (NG69, last updated December 2020) does not mention autism or ARFID in its recommendations^[28]. In 2020, the Maudsley clinicians who developed the PEACE pathway wrote that "there are no clear guidelines or recommendations" for autistic people with an eating disorder^[29].

Adapted care exists, and early results are encouraging

The best-known response is the PEACE pathway, begun by the Maudsley eating-disorder team in London to adapt existing evidence-based treatment^[29]. It was co-produced "with people with lived experience and with healthcare professionals"^[30]. Preliminary results, comparing admissions before and after the pathway was introduced, suggested shorter admissions for autistic patients, not seen in other patients, with estimated savings of about £22,837 per patient and £275,000 a year for the service; the authors say evaluation is continuing^[30]. A 2025 study distilled eight areas adapted care must cover, from sensory management and nutritional care to staff training, into a checklist for other services^[31].

• England: NHS England's 2026 children's guidance points services to PEACE resources and notes the legal duty, under the Health and Care Act 2022, for registered providers to train all staff in autism and learning disability^[15].
• Scotland: Edinburgh-led 2026 guidelines, co-produced with autistic people with lived experience, parents, clinicians and researchers, set out how to adapt family therapy for autistic young people with anorexia^[32].
• Wales: a Cardiff-led Delphi study of 49 researchers, clinicians and experts by experience agreed 56 recommendations on treatment adaptations, staff training and service organisation^[33].
• Australia: the Sydney study outlines "safe and supportive" care built on lived experience^[26].

The evidence is early, and the Delphi authors call for research into whether these adaptations improve outcomes^[33]: a reason to evaluate adapted care properly, not to wait.

What the evidence asks of us

• Look both ways. Screen for ARFID in autistic people and for autism in people with ARFID^[13], and assess autism in people with anorexia^[1], taking care to separate autism from the effects of starvation^[8].
• Make adaptation the default. Accommodate sensory and communication differences and allow flexible treatment timeframes^[33][24].
• Update guidelines. NICE's guideline recommendations are silent on autism^[28]; NHS England's 2026 children's guidance shows how it can be done^[15].
• Commission ARFID pathways for children, as NHS England asks^[15], and plan for the adults with ARFID already in adult services^[5].
• Co-produce care and research with autistic people, as PEACE and the new family-therapy guidelines did^[30][32].
• Fund the gaps: research in diagnosed autistic samples^[24], in men and people of other genders^[33][7], beyond anorexia^[17], and on outcomes and cost^[30].

Support: in the UK, the charity Beat runs eating-disorder helplines for England (0808 801 0677), Scotland (0808 801 0432), Wales (0808 801 0433) and Northern Ireland (0808 801 0434), plus web chat and email^[34]. Elsewhere, findahelpline.com lets you search free helplines by country and topic, including eating and body image.

Language: this piece uses identity-first language ("autistic people"), the preference of most autistic-led organisations, and uses clinical terms such as "autism spectrum disorder" only when naming a study or diagnostic category.

Why we're publishing this

Health Insurance UK is a commercial health-insurance resource, not a charity and not a campaign. Autistic people, families and autistic-led organisations have long said that eating-disorder care often does not fit them, and the research now largely agrees. We have gathered the evidence in one place, ready for a commissioner, a guideline committee or a journalist. The case belongs to the community living it; our part is to present the data plainly. This article is part of our Autism & Health research library.

How to read this data

Estimates of autism among people with eating disorders depend on the measure. Observation tools (ADOS) and questionnaires (AQ-10) capture current characteristics, which starvation and other conditions can raise, so a score above a cut-off is not a diagnosis. Registers count only recorded diagnoses and miss people never assessed. Most clinical studies are small, mostly female and from the UK or northern Europe; the US ARFID figure is a questionnaire-based model in a volunteer cohort. Finnish figures are odds ratios, not risks, and Swedish treatment figures are unadjusted. Figures from different studies are not directly comparable and are not a trend. This is analysis of published research, not new research.

Use this data

Free to cite with attribution to Health Insurance UK. Charities, campaigners and journalists are welcome to reuse these figures and charts. For the underlying figures as a spreadsheet, get in touch.

Important: This article summarises published research for general information. It is not medical advice and cannot be used to diagnose, treat or predict anything about an individual. If you have concerns about your own or someone else's health, please speak to a qualified health professional.

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