While the exact cause of ADHD remains unknown, more and more research is showing a clear connection between nutrition and conditions like ADHD. Fortunately, for parents of children with ADHD, diet is relatively easy to change – and a healthy diet can result in remarkable improvements in ADHD symptoms.

In this article, we'll take a closer look at the relationship between nutrition and attention deficit hyperactivity disorder (ADHD), discussing some of the most recent research showing the link between nutritional deficiencies and ADHD. We'll also discuss how through a combination of diet changes, physical activity, and talk therapy, children with ADHD can thrive.

The Relationship Between ADHD and Nutrition

The relationship between ADHD and nutrition has become a focus of scientific research in recent years. Research has shed light on the potential benefits of omega-3 fatty acids for ADHD, the impact of some food additives on hyperactivity, and the protective effects of diets like the Mediterranean diet.

However, while nutrition has been shown to reduce symptom severity in children with ADHD, the symptoms of ADHD can also make it difficult to maintain a healthy diet. For example, impulsivity symptoms and poor emotional regulation can lead to binge eating. The food additives in unhealthy food may then worsen ADHD symptoms.

When determining the best diet for children with ADHD, parents and ADHD specialists must recognise the role diet plays in ADHD while also understanding that nutritional needs vary for every child.

Nutritional Deficiencies in Children with ADHD

Research suggests that children with ADHD may be more prone to certain nutritional deficiencies. One systematic review found that people with ADHD often have lower levels of omega-3 fatty acids, zinc, magnesium, and iron compared to those without ADHD. Another systematic review and meta-analysis found that children and adolescents with ADHD have lower levels of vitamin D compared to healthy children.

These nutritional deficiencies can impact neurotransmitter function and brain development. For example, iron plays a crucial role in dopamine synthesis, while omega-3 fatty acids are essential for brain cell structure and function.

While more research is needed to establish the nutritional mechanisms underlying ADHD, it's clear that children with ADHD often suffer from nutrient deficiencies. Fortunately, by addressing these nutritional gaps through vitamin D supplementation and other diet changes, it's possible to reduce ADHD symptoms.

ADHD and Blood Sugar Levels

For children with attention deficit hyperactivity disorder, it's also important to monitor blood sugar, as blood sugar levels play an important role in regulating mood, focus, and energy. While ADHD does not directly cause low blood sugar, difficulties with attention may cause children with ADHD to forget to eat during the day, reducing blood sugar levels and causing fatigue, restlessness, and poor focus.

Children with ADHD also struggle with impulsivity, which means they may binge snack on high-sugar foods, increasing blood sugar levels and worsening ADHD symptoms.

Why Maintaining a Healthy Diet is Difficult with ADHD

Maintaining a healthy diet can be particularly challenging for children with ADHD, as poor attention and emotional dysregulation often impact eating habits. For example, many children with ADHD struggle with irregular eating patterns, such as forgetting to eat during the day and overeating at night. ADHD stimulant medications can also suppress appetite, further limiting nutritional intake.

Impulsive decision-making often leads to unhealthy food choices and some children may use food for stimulation or to cope with mood fluctuations. Food sensitivities and digestive issues are also common among people with ADHD, potentially limiting the variety of food a child with ADHD will eat.

These challenges underscore the importance of consulting with ADHD specialists to understand the relationship between diet and ADHD and can provide tailored strategies to support healthy eating habits.

Foods That Make ADHD Symptoms Worse

Avoiding unhealthy food is an important aspect of regulating ADHD symptoms. While responses can vary, certain food groups are potential triggers for ADHD symptoms:

• High-sugar foods: Sweets and soft drinks can cause rapid blood sugar fluctuations, affecting mood and focus.
• Caffeine: Drinks that contain caffeine can disrupt sleep patterns, worsening ADHD symptoms.
• High-sodium foods: Foods high in sodium can lead to dehydration, affecting executive functioning.
• Fried foods: Fried foods contribute to inflammation, which can also impact cognitive functioning.
• Highly processed foods: Processed foods lack essential nutrients, which can contribute to poor concentration.
• Allergens (eg gluten, dairy): Allergens can cause inflammation, potentially impacting brain function.
• Preservatives (eg sodium benzoate): Preservatives such as sodium benzoate have been found to increase hyperactivity in children with ADHD.

These foods and additives can worsen ADHD symptoms, but can also affect the overall health of children and adolescents. Therefore, it's beneficial to avoid these foods entirely to minimise health risks. Keeping a food diary and working with an ADHD specialist can help parents and their children identify personal triggers and develop diet interventions that can improve symptoms of ADHD.

Healthy Foods that Reduce ADHD Symptoms

While the list of foods to avoid can be overwhelming, incorporating the following foods into your child's diet can alleviate ADHD symptoms and improve overall health:

• Omega-3 rich foods (eg fatty fish, flaxseeds): Omega-3 fatty acids support brain function and focus.
• Protein-rich foods: Help stabilise blood sugar and improve concentration.
• Complex carbohydrates (eg oats, lentils): Provide sustained energy, reducing inattentive symptoms, and improving mood.
• Leafy greens: Rich in folate and can improve iron deficiency, which may help with dopamine regulation.
• Berries: Contain antioxidants that protect brain cells from oxidative damage.
• Nuts and seeds: Contain healthy fats such as polyunsaturated fatty acids and protein. Can also improve zinc deficiency.
• Whole grains: Provide essential nutrients and sustained energy.
• Eggs: Rich in choline, which is crucial for memory, focus, and brain health.
• Lean meats: Can address B-vitamin and iron deficiency, supporting brain function.
• Legumes: Provide protein and complex carbohydrates for stable energy.
• Fermented foods: Support gut health, potentially improving ADHD symptoms.

While nutrient intake can improve symptoms of ADHD, it's not a cure-all. Following these dietary guidelines, in combination with physical activity and ADHD therapy, can lead to better outcomes.

Contact The ADHD Centre for nutritional advice and personalised ADHD treatment.

Dietary Supplements for ADHD

Eating a balanced diet, limiting sugary foods and avoiding food additives can be very beneficial, but sometimes nutritional supplements are also necessary for addressing nutrient deficiencies in children and adolescents. The following nutritional supplements have shown promise in alleviating ADHD symptoms and improving brain health:

• Omega-3 fatty acids: According to a systematic review and meta-analyses, supplementation with omega-3 polyunsaturated fatty acids can produce small but statistically significant reductions in ADHD symptoms.
• Zinc supplements: According to double-blind randomised controlled trials, zinc supplementation may improve inattention in children and adolescents with ADHD.
• Iron supplements: Ferritin is a blood protein that contains iron. Low ferritin levels are common in children with ADHD. One study showed that children who took iron supplements saw increased levels of ferritin levels and reduced ADHD symptoms.
• Vitamin D: In a systematic review and meta-analysis of randomised controlled trials, taking vitamin D supplements resulted in a small but noteworthy reduction in ADHD symptoms.

While Omega-3, zinc, iron, and vitamin D supplements show promise in treating some specific ADHD symptoms, it's essential to consult an ADHD specialist to rule out any potential adverse effects from nutritional supplements.

Beyond Diet: Other ADHD Treatments

A holistic approach is optimal when treating ADHD, compared to focusing on diet alone. Treating ADHD should involve a combination of the following approaches for the best results:

ADHD Mindfulness

Mindfulness therapy can be particularly effective in promoting awareness of emotional eating patterns. By learning to recognise triggers and respond thoughtfully rather than impulsively, children can make conscious food choices that support their overall health. Mindfulness can also teach parents to be more aware of the foods they eat at home, promoting healthier eating for the whole family.

Cognitive Behavioural Therapy (CBT)

Cognitive behavioural therapy (CBT) is a form of talk therapy where children can learn to manage their ADHD symptoms and eating habits by changing the way they think and behave. CBT can help children identify and challenge thought processes that lead to poor dietary habits, helping them develop healthier relationships with food.

ADHD Medication

For some children, medication is an essential aspect of managing both ADHD symptoms and diet. Medication can reduce impulsivity and improve attention, supporting better decision-making when it comes to food choices and reducing binge eating.

Comprehensive ADHD Treatment at The ADHD Centre

At The ADHD Centre, our ADHD specialists take a comprehensive approach to treating ADHD. Through evidence-based ADHD treatment, nutritional guidance and emotional support, we help children develop healthy eating habits that support and improve their ADHD symptoms.

Through dietary advice, mindfulness, talk therapy, and ADHD medication, we provide the support and practical skills children need to develop a healthy relationship with food and thrive with ADHD.

Contact The ADHD Centre for comprehensive ADHD nutritional support

FAQ: ADHD and Nutrition

Do sugary foods cause ADHD?

While sugary foods don't directly cause ADHD, they can exacerbate symptoms in some children. High sugar intake can lead to blood sugar fluctuations, which affects mood, focus, and behaviour. Therefore, a balanced diet with moderate sugar intake is best for managing ADHD symptoms.

Is there a link between ADHD and nutrition?

Yes, there is a link between ADHD and nutrition. While diet alone doesn't cause or cure ADHD, nutritional factors can influence symptom severity and overall ADHD management. A balanced diet rich in essential nutrients can support brain function and potentially help alleviate some ADHD symptoms.

What are some foods an ADHD child should avoid?

While individual responses vary, certain foods that can worsen ADHD symptoms include high-sugar foods, highly processed foods, and foods containing allergens and preservatives. Some children may also be sensitive to caffeine, dairy, or gluten. It's best to work with an ADHD specialist to identify specific triggers. Elimination diets and switching to allergen-free food may also improve symptoms.