Why Is Eating So Hard for Autistic and ADHD People?
A Neuroaffirming Guide to Food, Sensory Issues & Nutrition for people with neurodivergence.
Why can eating be so hard for Autistic and ADHD people?
Eating is often assumed to be easy and natural for everyone. Mostly, the process of feeling hungry, recognising it is time to eat, deciding what to eat, and then sitting down to eat happens automatically. However, eating is a complex skill that develops over time. For some people these automatic steps do not work smoothly or clearly, which can create daily challenges.
What does ‘good enough nutrition’ actually look like?
Much of the research to date exploring nutrition and neurodivergence has focused on investigating whether specific nutrients, dietary modifications, and/ or supplements can influence symptoms and behaviours. While this is an important and growing area of nutrition science, it is not the focus of my day-to-day work.
What I focus on is a "good enough eating". That is, eating patterns that are sustainable, nourishing, and as stress-free as possible for individuals, carers and families. It is an approach to eating that recognises nutrition is not about perfection. It is about finding ways to eat that support health while also being practical, sustainable, and compassionate toward ourselves and others.
What are eating differences / picky eating in Autism and ADHD?
Our understanding of the unique skills involved in eating, and how they vary from person to person based on neurobiology, sensory experiences, and individual preferences, is still developing. From now on, I am going to use the term “eating differences” used by my colleagues to refer to the many eating behaviours that can be present across the spectrum of human eating experiences including in Autism, ADHD, sensory processing differences, eating disorders, Avoidant Restrictive Food Intake Disorder (known as ARFID) and other eating preferences.
Previously eating differences may have been referred to as fussy or picky eating and defined as short-term unwillingness to eat some foods or an attraction to specific flavours or textures. It is considered a common developmental stage in early feeding, and as children develop, they usually develop greater acceptance for new tastes and flavours. For some children, picky eating may continue as they get older and even get worse, developing into an aversion or anxiety related to food that lasts longer. For kids who experience persistent picky eating, research has found they often have sensory processing differences that makes them reject certain food textures, smells or tastes. Additionally, research has consistently shows that people with autism, and ADHD may also have altered sensory processing. This confirms that for kids and adults with sensory processing differences that they aren’t preferences that people can simply change through willpower but are neurologically driven responses to sensory and overwhelming stimuli.
Why are sensory issues with food common in autism and ADHD?
Sensory differences influence the way a person responds to the sensory qualities of food, including its taste, smell, texture, temperature, and appearance. Some people may be highly sensitive to certain sensations, making foods unpleasant or difficult to eat, while others may seek stronger sensory input. These differences influence food preferences, willingness to try new foods, and overall eating habits, highlighting the important role that sensory processing plays in nutrition and mealtime experiences.
Research also shows that in neurodivergence, awareness of internal body states such as hunger and fullness (but also thirst or body temperature) can be impaired and these internal messages from the body might not provide reliable signals about when, how much or what to eat.
These sensory and eating differences can also mean for adults with neurodivergence that planning meals, making the decision to eat, and/or the process of eating, have barriers that are not always visible to others.
Why do some neurodivergent people prefer the same foods and brands?
Commonly accepted foods include carbohydrate and grain products (for example, pasta, macaroni and cheese, pancakes, waffles, cereal, pizza, bread, crackers, and rice). Chicken nuggets are a commonly accepted food as they are commercially packaged and designed to be highly consistent, and are the same size and shape, texture (crispy outside, soft inside) and taste. It is common for children with eating differences to prefer not only the same food but the same brand because of this consistency and predictability that can make them much easier to eat and therefore less stressful mealtime experience.
Texture hypersensitivity is a common eating difference and food related challenge for neurodivergent individuals. Mixed textures can be particularly challenging because they have an uncertain and unpredictable texture for example yoghurt with fruit pieces compared with vanilla yoghurt that is consistently smooth. Other sensitivities can be to smell and to temperature where food is acceptable at one temperature but completely unacceptable at another. Visual presentation can trigger a sensory response before its even tasted.
Common aversions in people with eating differences included avoidance of fruit and vegetables largely because they have a very unpredictable taste and texture and can vary from one piece to the next. They may have a mixed textures (like a crunchy outside with a soft inside), a strong odour or intense bitter flavours. In fact, some individuals may be considered ‘super sensors’ in that they have a heightened experience of the temperature, texture, taste, appearance or smell of foods. There are genetic variations in how some people can detect bitter compounds, for example in vegetables such as broccoli and Brussel sprouts.
What are eating differences in neurodivergence?
Eating differences include but are not limited to the following:
Choosing or avoiding foods based on sensory characteristics
Texture
How it tastes or flavour (either too much flavour or not enough)
Smells or aversion to foods with a strong smell such as fish
Temperature e.g. hot food hot, and cold foods cold
If food doesn’t look right including food touching on the plate
Preferences for sameness and predictability
Having only a few preferred or safe foods
Specific brands preferences
Foods based on colour or shape
Preferring bland or neutral-coloured foods
Other behaviours around foods
Finding eating a chore, boring or inconvenient e.g. eating being described as "putting food in my belly so it stops complaining”
Challenges around deciding what to eat especially when there are multiple options called “decision fatigue”
Forgetting to eat
Avoiding foods that require chewing, or alternatively swallowing food without chewing
Eating pace (too fast or too slow)
Using preferred plates and utensils
When someone with eating differences encounters a triggering food or overwhelming stimuli they might gag, feel nauseous or experience distress. They might panic when offered unfamiliar or new food with these distressing mealtime interactions described as “meltdowns”.
How can eating differences affect everyday life?
— What is the impact of these differences.
Historically, approaches to eating and nutrition have often been based on a "one-size-fits-all" model. Advice has tended to be generic without consideration of the neurological, sensory, and emotional complexities of feeding and eating. Generally, research has shown that some people see their eating as a part of their lives which can be managed and are still able to get their nutritional needs from the food that they eat, or with supplements. Others describe becoming more flexible around food as they became older.
However, for others, they may feel confused, overwhelmed, isolated, or just different from others. These differences may make it difficult to meet nutritional needs and lead to functional challenges and distress. This may prevent participating in social eating situations, family events, birthday parties, or school trips.
There may also be challenges with maintaining adequate nutrition, or consuming the recommended vitamins and nutrients required for growth and health. It can be source of distress for the person involved and their family with eating and mealtime becoming a battleground of stress, guilt, and exhaustion. Amplifying this is the reality that eating is not an occasional behaviour. It is one that occurs multiple times per day on an ongoing basis. So, the source of distress for children and their families can become a relentless daily battle.
For parents and carers stress is caused by concerns about long-term nutritional compromise, the uncertainty of whether a child will eat, the dread of meltdowns, and the guilt of resorting to preferred but nutritionally limited foods, and feeling frustrated about needing food different to what the family eats.
How can you make eating easier for an Autistic or an ADHD person?
What is the NOURISH framework?
— Accessing support and advice
How do we navigate these invisible hurdles that present as food refusal and distress and worries about long term nutrition.
The NOURISH guidelines were developed by A/Prof Susan Hart (Well Mind & Body Psychology) from her clinical experiences, being the mum to a neurodivergent child and looking at what other clinicians and researchers have investigated, to provide support and advice on sustainable ways to feed yourself and others.
They were also developed to provide framework for health professionals by summarising existing research, provide a clear outline to provide nutrition advice, and facilitate further research on this important topic. They have a pragmatic approach and acknowledge that we actually eat food, not nutrients. While nutrition science can provide valuable information, we do not consume meals in the form of nutrient spreadsheets, nutrition information panels or ingredient lists. As summarised buy Richards, the most scientifically perfect meal has no nutritional value if it is never eaten.
What are ‘safe foods’ and why do they matter?
Recognising and understanding unique eating differences is essential to providing meaningful support and developing strategies that work in both the short and long term.
Sensory mapping of preferred foods identifies which sensory characteristics make foods easier or harder for a person to eat. A starting point is identifying safe foods that are enjoyed and eaten consistently, neutral foods that are eaten sometimes, and “No go” foods that are always refused.
Other strategies to support eating can include sensory tools such as earphones to muffle sound or play preferred sounds, having sensory options (fidget toys, weighted blankets). Eating in physical environments that are calm and have reduced sensory stimuli in regard to noise, lighting, certain types of seats, and locations are often preferred.
A US based Dietitian with ADHD, Rebecca King (How to Eat Well for Adults with ADHD) says the key is finding the level of sensory input and preferences that are ‘just right”. She recommends offering food every 3-4 hours and having consistency to eat at a frequency where your body feels safe, energised and nourished.
She uses the mantra “fed is best” rather than aiming for perfect nutrition.
When should you see a dietitian for autism, ADHD or eating difficulties?
Accredited Practising Dietitians play an important role in supporting young people and adults who experience sensory processing differences, selective eating, food aversions, restricted food variety, and other nutrition-related challenges in the context of complex neurodevelopmental disorders. By working collaboratively with families and multidisciplinary teams, Dietitians can help improve nutritional adequacy, support growth and development, reduce mealtime stress, and assist young people to achieve meaningful nutrition and health goals.
Accredited Practising Dietitians are Medicare providers under the M10 (Complex Neurodevelopmental Disorders and Eligible Disabilities) program since 1 July 2025. Dietitians can provide assessment and treatment services for eligible children and young people up to the age of 25 on referral by a paediatrician or psychiatrist. Medicare M10 services for complex neurodevelopmental conditions and eligible disabilities | Australian Government Department of Health, Disability and Ageing. There are other pathways to accessing Accredited Practising Dietitians via you GP including Chronic Disease Management Plan, or an Eating Disorder Treatment Plan (with eligibility criteria).
