ADHD and Picky Eating in Kids: Top Tips from a Dietitian

ADHD and Picky Eating in Kids: Top Tips from a Dietitian

Attention-Deficit/Hyperactivity Disorder (ADHD) can create challenges in focus, behaviour, and daily functioning for children. While medication and therapy are common interventions, nutrition may play an important role.

This blog, written by a Registered Dietitian, will explore the research and provide practical, family-friendly strategies to support your child’s eating with ADHD and specifically picky eating.

What is ADHD?

ADHD is a pattern of inattention, hyperactivity, and/or impulsivity that interferes with functioning and development. This video summarizes ADHD well.

ADHD diagnosis can be primarily inattentive type, hyperactive/impulsive type or combined. And is classified as mild, moderate or severe. 

How common is ADHD? An estimated 7 million (11.4%) of U.S. children aged 3–17 years have been diagnosed with ADHD, according to a national survey of parents using data from 2022.  

ADHD & Other Medical Conditions

Stats show that nearly 78% of children with ADHD often have co-occurring disorders like autism, depression and anxiety. This can add another layer of complexity when understanding your child’s behaviour. 

How ADHD Leads to Eating Problems

There are many reasons why kids with ADHD have difficulty eating. Overall, inattention and hyperactivity/impulsive behaviour can make sitting down to eat a meal difficult for a child. 

Here are other reasons why kids with ADHD may struggle with eating too much or too little.

1. ADHD medications often decrease appetite

Common stimulant medications for ADHD have side effects that make it hard to eat. The most common I’ve seen among clients is a decreased appetite during the day. 

But medications can also cause constipation, nausea, heartburn, trouble sleeping and mood swings, which can make it even harder to eat. Luckily, different options might have fewer side effects for your child and help them throughout their day.

2. Sensory challenges

Children with ADHD are more likely than neurotypical peers to have sensory challenges. We have eight senses, and eating requires the use of all of them. From the sight, smell, texture and taste of food, sensory sensitivity can make it hard to be calm when presented with new foods. 

3. Increased food responsiveness and overeating

Someone with high food responsiveness might always be asking for food. Or have a stronger urge to eat when they see or taste food. 

There are a few reasons why ADHD children have more food approach behaviours like this. 

• Higher emotional dysregulation. 

People with ADHD may be at a higher risk for emotional eating because eating can be a coping mechanism used to regulate emotions.

So, as a parent of a child with ADHD, it’s even more vital that you don’t reward with food, as it may become a regular way to console negative emotions.

• Stronger reward from food

A brain imaging study found stronger reward receipt in ADHD participants. This means that food can lead to a stronger reward or “dopamine hit” in people with ADHD. High reward pathways may cause seeking food, leading to the ‘reward.’

• Lower Response Inhibition

Response inhibition refers to the ability to resist temptations. Lower response inhibition can lead to overeating. Research shows that 40-50% of children with ADHD exhibit response inhibition deficits (though medication can help).

Nutritional deficiencies and ADHD 

Kids with ADHD tend to be lower in certain vitamins and minerals. Supplementing with these nutrients, such as B Vitamins, magnesium, and zinc, may be helpful. Probiotics, prebiotics, and gut health are other promising areas for the future.

I’ll review a few supplements in depth below that may support your child, depending on their dietary intake and nutrient status.

Iron 

People with ADHD have lower dopamine levels. Iron is a cofactor in making the neurotransmitter dopamine. And symptoms of low iron and ADHD are actually quite similar: inattention, poor school performance, irritability, slow growth and cognitive impairment.

A review study found an association between ADHD occurrence and severity with iron deficiency. And in studies that treated the iron deficiency with supplements, positive effects were seen on ADHD symptoms. 

Talk to your doctor about testing your child’s iron levels. If they are low, they will need high supplemental doses for 3 months and then re-test. For maintaining healthy iron levels, I like KidStar BioFE 10mg chewable tablets or drops (affiliate links).

Vitamin D

Kids with ADHD are more likely to have lower vitamin D levels than kids without ADHD. Clinical trials also suggest that vitamin D supplements (1000+ IU/day) can improve ADHD symptoms in children. 

If your child takes a multivitamin, check the amount of Vitamin D included. If you would like to add an additional Vitamin D supplement, these Vitamin D drops contain 1000mg (affiliate link).

Omega-3

Omega-3 fats are essential for brain development and function. Evidence on whether omega-3 supplements can benefit kids with ADHD isn’t conclusive. 

Generally, the studies where children took omega-3 supplements for longer (at least 3 months) and used EPA supplementation with 500 mg per day or more, showed improvement in the hyperactivity-impulsivity symptoms.

Nutrasea has an ADHD formula. One teaspoon contains 580mg EPA. For most other options, you’ll have to double the listed dosage to get over 500 mg EPA. If your child doesn’t like liquid supplements, my kids like NOW Omega-3 Plus Gummy Chews (2 a day to achieve 500mg+ EPA). But be aware that most other omega-3 gummies contain very little omega-3.

Micronutrient supplementation

A well-designed study randomizing kids aged 6-12 years with ADHD to placebo or broad-spectrum micronutrient intake found 54% of the micronutrient and 18% of the placebo group responded positively by blinded clinician rating (but not to parent-report). The micronutrient group also grew 6mm more than the placebo group. 

If you can find a broad-spectrum multivitamin that your child will take, it’s a good place to start. Here are some options: MetaKids Nutrition Powder (also contains protein, but no iron), chews (affiliate links), or Nano VM.

Can special diets help ADHD?

You may have heard of specific diets that might help with ADHD. Let’s review whether they are evidence-based and what international guidelines recommend.

Sugar and ADHD

A 2020 systematic review examined the effect of sucrose (sugar) compared to saccharin, aspartame (artificial sweeteners) or placebo (neither sugar nor sweetener) on ADHD symptoms in children. None of the studies found any difference in ADHD symptoms when children consumed sucrose, which means that sugar did not increase ADHD symptoms.

International guidelines do not make recommendations about sugar consumption in children and teens with ADHD.

Food Dyes and ADHD

If you find your child’s behaviour worsens after sugar, it’s actually more likely to be from the food dyes that often accompany sugary foods. 

A 2022 systematic review reported that just over half of the studies reviewed showed a small but significant association between synthetic food dyes and adverse neurobehavioural effects. And this was in children both with and without ADHD.

Health agencies in Canada and the U.K. do not recommend routinely restricting artificial food colouring from the diets of children with ADHD. However, Canadian guidelines state that removing food dyes may have a small beneficial effect on some children.

Before removing anything from your child’s diet, be sure to weigh the benefits vs risks. Risks could include feeling isolated if they’re the only kid around who can’t eat certain things. And this can also lead to cravings and overeating restricted food now and in the future.

Gluten and ADHD Symptoms

People with celiac disease may have higher odds of having ADHD than non-celiacs. A 2022 systematic review reported that most studies did find an association between celiac disease and ADHD.

However, only two very small studies have examined the effect of a gluten-free diet on ADHD symptoms. Both found significant improvements, but with just 8 and 9 participants, it’s hard to conclude.

Most countries’ ADHD treatment guidelines do not recommend celiac screening. NICE guidelines do note that if the child or their parents report a clear link between any food and worsened ADHD symptoms, explore the link with a dietitian.

DASH diet in ADHD 

High amounts of fruits, vegetables, low-fat dairy products, and low amounts of simple sugars may improve ADHD symptoms. This way of eating is similar to a DASH or “Dietary Approaches to Stop Hypertension” diet.

A randomized controlled trial investigated the effect of a DASH diet for 12 weeks in 80 children with ADHD aged 6 to 12 years. Parent, teacher and child-reported hyperactivity, emotional symptoms, teacher-reported conduct problems, peer relationship problems, and social behaviours were significantly improved in the DASH group compared to the control group. 

The results of a systematic review and meta-analysis of six dietary pattern studies suggest that a “healthy” dietary pattern, which is high in vegetables, fruits, seafood, polyunsaturated fatty acids, magnesium, zinc, and phytochemicals, is associated with a significantly reduced risk of ADHD.

And yet… practically, it may be almost impossible to “get” a child with ADHD to consume a “healthy” diet. As we discussed earlier, many factors make it hard for a child with ADHD to eat, and they are likely to be picky. So know you’re not alone!

Elimination/Oligoantigenic/Few Foods Diet:

An oligoantigenic diet is a type of “few foods” elimination diet that excludes all foods except those unlikely to cause allergic reactions.

This diet may include foods such as lamb, venison, quinoa, rice, pears, apples, peas and carrots. A reintroduction phase follows the exclusion phase, where foods are reintroduced one at a time and ADHD symptoms are noted.

A 2020 systematic review of 12 RCTs found that due to methodological problems, it is not clear whether elimination diets can improve ADHD symptoms in children and adolescents with ADHD. 

Elimination diets can cause nutrient deficiencies, are expensive and difficult to implement, to say the least. Unless there is a suspected food allergen, I generally would not recommend them.

British guidelines state that the long-term effects of elimination diets are unknown, and all potential benefits are short-term.

Canadian guidelines note that there is insufficient evidence to recommend any elimination diet in children with ADHD.

Australian guidelines do not make any dietary recommendations for children with ADHD.

American Academy of Pediatrics guidelines state: “Some nonmedication treatments for ADHD-related problems have either too little evidence to recommend them or have been found to have little or no benefit. These include mindfulness, cognitive training, diet modification, EEG biofeedback, and supportive counseling.”

Nutrition Tips for ADHD and Picky Eating

1. Why is your child a picky eater?

Determine if there’s an underlying reason for low appetite or food selectivity, such as medication, constipation, food intolerance, oral motor weakness, sensory sensitivity, low iron, enlarged tonsils, etc. 

I cover the possibilities in more detail in this Ultimate Guide to getting your child to try new foods.

2. Follow the Division of Responsibility

Can you use the Division of Responsibility (DOR) if your child has ADHD? In the DOR, parents control what, when and where kids eat. Kids control if they eat, and how much they eat.

The DOR promotes structure. Structure supports regulation.

 “Even more than other children, children with ADHD are helped to focus and attend to eating,” Ellyn Satter. 

BUT, we may need to look through an ADHD lens, and make a few modifications to the DOR “rules.”

WHEN: 

Structuring meal and snack times will help ‘interoception’ or your child’s ability to listen to their hunger and fullness signals. The more consistently your body is nourished from regular, balanced eating, the better you can regulate your emotions and behaviours.

Saying that, you may need to add in an extra bedtime snack or eating opportunity if your child doesn’t eat much during the day due to medication and says they’re hungry!

WHAT: 

Ideally, offer your children a variety of foods, similar to the rest of the family. Yet if their appetite is so low during the school day that they struggle to eat anything at all, and end up crashing, you may need to provide all “safe” or favourite foods in their lunch in the hopes they will eat some of it.

WHERE: 

Eating at the family table is still ideal. Depending on your child’s sensory sensitivities, you can help make the table an easier place for them to be and set them up with appropriate tools to assist eating.

Here are a few more tips on making the dining table an easier place to eat:

• Cut out distractions

Children are easily distracted during meal times, especially for those with ADHD. Try to cut down distractions by turning off televisions and any devices while eating.

• Try sensory cushions, toys or weighted blankets.

If your child finds it difficult to sit at the dinner table, consider using sensory cushions that allow movement when sitting, as they can provide sensory input to help your child remain seated for longer. 

Or allow them to stand, play with a toy or try a weighted lap blanket. Discover how to channel that extra energy at the table!

IF/HOW MUCH

Your child still gets to control this. They may need extra interoception support from an Occupational Therapist if they struggle to listen to their appetite. 

If ADHD medication leads to decreased appetite, guidelines recommend:

• Adjust the timing of medication so it is not taken before a meal (i.e. take it after breakfast instead of before).
• Add an extra snack late at night or early in the morning to take advantage of the increased appetite that occurs when the medication has worn off. 
• Provide preferred foods when appetite is low.
• See a dietitian to optimize the caloric content of food.
• Avoid caffeine, which can make side effects worse.
• Take planned breaks from medication one weekend or during holidays, or consider changing to a different medication if growth slows down.

The Bottom Line: ADHD and picky eating

If your child has ADHD and is also a picky eater, you’re not alone—and you’re not doing anything wrong. Eating challenges are a regular part of ADHD, whether it’s due to medication side effects, sensory sensitivities, or differences in how the brain processes reward.

The good news? Small, consistent strategies—such as creating mealtime structure, relying on safe foods when needed, and supporting nutrient needs with the right foods (and sometimes supplements)—can make a significant difference over time.

Remember, progress doesn’t mean your child suddenly loves every food. It means helping them feel safe, supported, and nourished while reducing mealtime stress for your whole family.

If you’d like more strategies to support picky eating (with or without ADHD), watch my free webinar: