Picky Eating and Autism in Adults: Causes and Solutions

by | May 6, 2025 | Autism and Diet

Key Points:

  • Picky eating in adults with autism often stems from sensory sensitivities and limited food preferences.
  • Understanding the root causes of picky eating behaviors can help develop strategies to expand food choices and reduce stress during mealtimes.
  • Applied Behavior Analysis (ABA) therapy offers valuable techniques to address picky eating in adults with autism, improving dietary flexibility and quality of life.

When it comes to adults with autism, picky eating can be more than just a phase. It is often a persistent and complex behavior that may affect an individual’s nutrition and overall well-being. In fact, research indicates that up to 89% of individuals with autism experience at least one form of feeding challenge.

Picky eating and autism can be closely linked, as many individuals on the spectrum experience sensory sensitivities, strict routines, and aversions to certain textures, smells, and tastes. These factors can make mealtimes particularly challenging. 

Understanding the reasons behind picky eating in autism is key to finding effective solutions. In this article, we will explore the causes of picky eating in adults with autism, along with strategies and approaches to help manage and improve eating habits.

What is Picky Eating in Autism?

Picky eating in adults with autism typically refers to a restricted diet where individuals may refuse to eat certain foods or exhibit strong preferences for specific types of food. Unlike typical childhood picky eating, this behavior can continue into adulthood and sometimes become more rigid over time. 

Because of this, mealtimes can sometimes become a source of stress rather than enjoyment, both for the individual and those around them. The texture, smell, color, or even the way food is presented can significantly impact whether it’s considered acceptable. 

For many adults with autism, maintaining a sense of control over their food choices helps reduce anxiety and creates a feeling of safety. Understanding and respecting these needs, rather than trying to force change, can lead to more positive experiences around eating and support overall well-being.

picky eating and autism

Why Does Picky Eating Occur in Adults with Autism?

For many adults on the autism spectrum, picky eating is linked to sensory sensitivities. These sensitivities are not just limited to sight or sound, but also extend to taste, texture, smell, and temperature of foods. Foods with certain textures or smells might trigger discomfort or anxiety, making them unbearable to eat.

In addition, individuals with autism often have a strong need for routine. This rigidity can also affect food choices, leading to a preference for the same foods daily, as the consistency provides comfort and predictability. Trying new foods may cause stress or unease due to the unpredictability involved. To help introduce nutritious options in a way that feels safe and familiar, check out our article, Try These 5 Kid-Approved Healthy Snacks for Autism Support.

How Does Picky Eating Impact Adults with Autism?

Picky eating behaviors in adults with autism can have a significant impact on daily life, affecting not only nutrition but also social interactions and mental well-being. It’s important to address these challenges comprehensively:

1. Nutritional Deficiencies

A limited diet often means that individuals with autism may not be getting all the necessary nutrients their bodies need. 

Commonly avoided foods like fruits, vegetables, and grains can lead to deficiencies in vitamins and minerals that are vital for overall health. This can contribute to physical health problems over time.

2. Social Isolation

Social events often revolve around food, whether it’s family dinners, holiday meals, or outings to restaurants. 

For adults with autism, the anxiety surrounding eating certain foods or the pressure to conform to social expectations can lead to avoidance of these events. This isolation can result in loneliness and a lack of connection with others.

3. Stress and Anxiety During Mealtimes

Eating can become a stressful experience if an individual feels overwhelmed by food choices or sensory issues related to eating. The act of eating can trigger feelings of discomfort, leading to anxiety, meltdowns, or avoidance behaviors. Over time, this can worsen the individual’s relationship with food.

What Are the Causes of Picky Eating in Adults with Autism?

The causes of picky eating in adults with autism are often multifaceted and can vary from one individual to another. Some of the key factors contributing to picky eating behaviors include neurological, psychological, and environmental influences, such as the following:

picky eating and autism

What Are the Consequences of Reinforcing Picky Eating Behavior?

Reinforcing picky eating behavior can have significant short- and long-term effects on an individual’s health and quality of life. When limited food choices are consistently supported without addressing the root causes, it can deepen food-related rigidity. 

Physically, a persistently narrow diet may lead to nutritional imbalances or deficiencies, which can affect everything from immune function to cognitive development. In the long term, this can increase the risk of chronic health conditions such as heart disease, gastrointestinal issues, and weakened bone health due to a lack of essential nutrients.

Beyond the physical consequences, reinforcing picky eating can also impact mental and social well-being. It may heighten food-related anxiety, contribute to social isolation during mealtimes, and limit the ability to participate in everyday activities involving food. 

5 Solutions for Picky Eating in Adults with Autism

While picky eating can present challenges, there are several strategies that can help adults with autism expand their food choices, reduce mealtime stress, and improve their overall eating habits. A combination of behavioral techniques, environmental modifications, and gradual food exposure can support positive change:

1. Gradual Exposure to New Foods

One effective approach is gradual exposure, which involves slowly introducing new foods in a controlled and stress-free way. This might start with showing the individual a new food, then progressing to having them touch or smell it, and eventually tasting small amounts. It’s important to make the experience as low-pressure as possible.

2. Modifying Sensory Experiences

To reduce sensory discomfort, you can modify the sensory aspects of eating. For example, changing the texture of food (e.g., offering smoothies instead of whole fruit) or presenting food in a more visually appealing way (e.g., cutting food into fun shapes or organizing it in a certain pattern) can make meals more tolerable.

3. Using Positive Reinforcement

Positive reinforcement is an effective way to encourage new eating behaviors. Rewarding an individual for trying new foods or for eating a wider variety of foods can motivate them to continue expanding their diet. Rewards can be tangible, like a favorite activity, or intangible, like verbal praise.

4. Incorporating Preferred Foods

Gradually incorporating new foods alongside the individual’s preferred foods can help ease the transition. Offering a variety of options that are still within the individual’s comfort zone helps create a sense of predictability, while also encouraging flexibility in food choices.

5. Establishing Consistent Routines

Maintaining a structured mealtime routine can help reduce anxiety and build predictability around eating. Having set times for meals, as well as clear expectations for the process, can create a sense of security for adults with autism and reduce the stress they may associate with mealtimes.

How ABA Therapy Can Address Picky Eating in Adults with Autism

ABA (Applied Behavior Analysis) therapy has been shown to be an effective early intervention for addressing picky eating in individuals with autism. ABA therapy uses principles of behavior to teach new skills and modify behaviors, including eating habits. Here’s how ABA can help:

  • Behavioral Interventions: ABA therapists can use reinforcement strategies to encourage individuals to try new foods and expand their dietary preferences.
  • Desensitization Techniques: ABA incorporates desensitization techniques to gradually reduce food aversions and increase tolerance to new textures, smells, and tastes.
  • Individualized Programs: ABA therapy is tailored to each individual’s specific needs, ensuring that the approach aligns with their sensory sensitivities and behavioral patterns.

Through ABA therapy, adults with autism can learn to manage anxiety around food, improve their ability to try new foods, and develop healthier eating habits over time.

Support Your Child’s Progress With ABA Therapy 

If you’re looking for support in managing picky eating and autism, Amaze ABA offers ABA therapy in Georgia, Nebraska, Maryland, and Virginia. Our team of experts works with individuals and families to address picky eating and other challenges associated with autism, using research-based strategies that promote lasting change. 

Whether it’s helping expand food choices or reducing mealtime anxiety, we’re here to guide you through the process. Contact us today to learn more about how we can support your loved one with ABA therapy in Georgia, Nebraska, Maryland, and Virginia!

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