Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental condition that affects about 1 in 10 school-aged children in Australia, New Zealand, and the United States, with symptoms often continuing into adulthood. ADHD is considered a “chronic and debilitating” condition and it is characterized by persistent inattention, hyperactivity, and impulsivity, all of which interfere with learning, relationships, and daily functioning. There are also physical health risks that accompany the disorder such as a higher likelihood of developing dependencies on nicotine, alcohol, cocaine and other drugs, as well as higher rates of obesity, binge eating, and self-harm.

While genetics play a role, ADHD is not solely genetic. A Functional approach recognises hereditary factors, including the maternal transfer of nutrients, toxins, microbiome and mitochondria. It also recognises that beyond genetics, ADHD symptoms may be influenced by diet, gut health, immune regulation, environmental exposures, and lifestyle factors.While genetics play a role, ADHD is not solely genetic. A Functional approach_ recognises hereditary factors, including the maternal transfer of nutrients, toxins, microbiome and mitochondria. It also recognises that beyond genetics, ADHD symptoms may be influenced by diet, gut health, immune regulation, environmental exposures, and lifestyle factors.

Traditional research highlights a strong genetic component in ADHD, with children often having a parent or close relative with the condition. In fact, studies show that ADHD runs in families, with heritability estimates around 70-80%, and about one in four children with ADHD has a parent who also meets criteria for the condition.

However, functional practitioners recognize that family ADHD is shaped not only by genes but also by shared environmental and lifestyle influences. These may include:

• Prenatal exposures such as maternal stress, alcohol, and toxin exposure
• Household environmental toxins (e.g., heavy metals, pesticides, plastics)
• Shared dietary patterns (nutrient deficiencies, high processed food intake, food intolerances)
• Family stress dynamics, sleep routines, and activity levels
• Gut microbiome patterns that influence brain and immune health across generations and cause “leaky gut”
• Parents with chemical intolerances (mold, chemical inhalants, foods and food additives, pesticides, drugs, etc.) are more 2.1 times more likely to have a child with ADHD (and 5.7 times more likely to have a child with autism) *
• Environmental pollutants like lead, phthalates, and bisphenol A (BPA) are “moderately to highly” associated with ADHD *

By assessing these factors, functional practitioners help families understand the modifiable contributors to ADHD symptoms, opening new pathways for prevention and treatment.

A Functional Medicine Approach

Rather than focusing only on symptom control, the functional approach aims to uncover and address underlying imbalances that contribute to ADHD. Core strategies include:

• Nutrition: Improving intake of essential fatty acids, B vitamins, and minerals that support neurotransmitter balance and brain function.
• Supplementation: Individuals with ADHD often have lower levels of magnesium, and clinical trials have shown improvement in ADHD symptoms when this is supplemented into the participants treatment—especially when combined with vitamin D.
• Food Sensitivities and Allergies: Identifying food intolerances (e.g., gluten, dairy, food additives) and removing them.
• Gut–Brain–Immune Health: Restoring microbiome balance, reducing inflammation, and strengthening the vagus nerve connection to improve cognition, focus, and emotional regulation.
• Detoxification & Environmental Health: Screening for heavy metals, pollutants, and household toxins that may interfere with neuronal signaling and methylation pathways.
• Metabolic & Neurotransmitter Support: Correcting methylation defects, supporting mitochondrial function, and regulating blood sugar to stabilize attention and mood.
• Lifestyle & Stress: Establishing sleep hygiene, physical activity, and family-based stress management to reduce symptom triggers.

Why It Matters

An integrative, functional approach to ADHD gives families a broader toolkit beyond medication. By uncovering both genetic and environmental drivers, functional practitioners can create personalized plans that reduce symptom burden, improve daily functioning, and support long-term brain health.