Written by Christina Hanley BHSc (Nutritional Medicine) | ANTA member #20854 | Nutritionist & Digital Experience & Content Manager at Mr Vitamins with 8 years of clinical experience.

Reviewed by Adrian Reynardi BHSc (Naturopathy) | Grad. Dip. (Management) | Naturopath | ATMS Member #54454 | Store Manager at Mr Vitamins with 6 years of clinical experience.

Published: 17/09/26 · Next review: September 2027 [How we review health content] · [Meet our practitioner team]

Important health information

ADHD requires assessment and ongoing management by a qualified health professional. This article is general education only: nothing here suggests that food or supplements treat, cure, prevent or manage ADHD, and nothing here should be used to self-diagnose or to change prescribed medication. Speak with your GP, paediatrician, psychiatrist or pharmacist before changing your diet or starting a supplement and always read the label. Any doses mentioned are those used in published research, given for context only.

Key takeaways

How what you eat affects how your brain works

For people living with ADHD, the conversation around management often centres on medication and behavioural strategies. What you eat influences how your brain produces and regulates the neurotransmitters involved in focus, impulse control and emotional regulation. Focusing on nutrition is one of the easiest ways day to day to support general brain health, and it works alongside your health professional's care rather than in place of it.

Why the ADHD brain has different nutritional needs

ADHD involves differences in dopamine and noradrenaline signaling, the two neurotransmitters most involved in attention, motivation and executive function [1]. These neurotransmitters are built from amino acids derived from food. When the diet is low in the raw materials needed to produce them, the brain has less to work with. Reviews of diet and ADHD also note that blood sugar instability, common in diets high in refined carbohydrates and low in protein, is associated with poorer attention and self-regulation. [2].

Protein and amino acids: the building blocks of focus

Dopamine and noradrenaline are synthesised from the amino acid tyrosine, which comes from dietary protein. Without adequate intake, the brain simply does not have the raw materials it needs. A protein-containing breakfast supports steadier energy and appetite through the morning, the period many people with ADHD find hardest, and reviews in this field identify regular, balanced meals as a sensible general measure rather than a proven treatment [2]. Good sources include eggs, lean meats, fish, legumes, nuts, seeds and dairy.

Omega-3 fatty acids: the most researched nutrient in this field

Omega-3 fatty acids, especially the two called EPA and DHA, are the most studied of the nutrients covered here. Chang and colleagues pooled the results of several trials and found small but real improvements in attention and hyperactivity among children and teenagers with ADHD who took omega-3 supplements, as rated by clinicians and parents. The improvement was largest in those whose omega-3 levels were low to begin with [3].

About 60% of the brain's dry weight is fat, and DHA is a large part of that fat. So how much DHA the body has available may affect how well brain cells talk to each other [3]. Most of these trials used about 1–2 g of EPA and DHA combined per day [3]. However, what is appropriate for you is a conversation for your GP or pharmacist, particularly if you take blood-thinning medication.

4 Most Discussed Micronutrients To Support ADHD

Low iron, zinc and magnesium levels are reported more often in people with ADHD than in the general population, but it’s important to keep in mind that correcting a nutrient deficiency is not the same as treating ADHD.

1. Iron

Iron is one of the micronutrients the body needs in order to make dopamine. Konofal and colleagues compared 53 children with ADHD against 27 children of the same age and sex who did not have it. They measured ferritin, a blood marker of how much iron the body has stored, and found an average of 23 ng/mL in the ADHD group and 44 ng/mL in the others, Ferritin was unusually low in 84% of the ADHD group, compared with 18% of the others, and the children with the lowest levels tended to be the ones whose parents rated their symptoms as more severe [4].

2. Zinc

Zinc plays a part in regulating dopamine and melatonin, the hormone involved in sleep. In a 12-week trial, 400 children were randomly given either zinc sulfate at 150 mg a day or a dummy pill, with neither the children nor the researchers knowing who got which. The zinc group scored better than the dummy-pill group on hyperactivity, impulsivity and social behaviour [5].

3. Magnesium

Magnesium helps the nervous system work normally. In one trial, children with ADHD were randomly given either vitamin D and magnesium together or a dummy pill. Parents reported more improvement in behaviour and mood among the children taking the two nutrients than among those taking the dummy pill [6].

4. Vitamin D

The brain has vitamin D receptors throughout, including in the areas that handle dopamine. Research that observes groups of people, rather than testing a treatment, has found that lower vitamin D levels tend to go with more noticeable ADHD symptoms [6]. A blood test is the best way to identify a Vitamin D deficiency, and supplementation should be left to be decided by your practitioner, depending on your levels. Sunlight is the main source, with smaller amounts from oily fish, egg yolks and fortified milks.

"Iron, zinc, magnesium and vitamin D are more often low in people with ADHD."I always recommend testing before supplementing."Aline Karam. Clinical Nutritionist, Bachelor of Health Science (Clinical Nutrition), Diploma of Health Science

Blood sugar stability

Your brain runs on a steady supply of glucose from food. When blood sugar rises sharply after a meal and then drops away, many people notice it in their focus, their patience and their mood. Eating protein at every meal, choosing complex carbohydrates such as wholegrains, cutting back on high-sugar foods and not skipping breakfast are practical everyday steps, and they match what reviews of diet and ADHD recommend [2].

Gut health and the ADHD brain

Most of the body's serotonin is made in the gut, and gut bacteria help produce brain chemicals and influence inflammation. Pärtty and colleagues followed up a group of babies 13 years after some of them had been randomly given a probiotic called Lactobacillus rhamnosus GG. None of the children who had received it were later diagnosed with ADHD or Asperger syndrome, compared with six of the 35 children who had not. The two groups also had different mixes of gut bacteria early in life [7].

A practical nutrition framework for general brain health

Drawing the research above together, these are the general nutritional priorities that come up most consistently. They are everyday dietary principles, not a protocol for managing ADHD.

ADHD is not a one size fits all experience, and neither is the nutritional support that suits each person. Diagnosis and ongoing management belong with your GP, paediatrician or psychiatrist [8]. If you'd like personalised advice on what might suit you, visit your local Mr Vitamins store or book a free 10-minute consultation with one of our qualified practitioners.

What we see in practice

This section is by Adrian Reynardi BHSc (Naturopathy), ATMS member #54454, the naturopath who manages our World Square store and clinically reviewed this article. It is his own account, drawn from six years of consultations and day-to-day conversations with customers.

“At Mr Vitamins World Square, we often see customers whose trouble focusing comes down to skipped meals. With those customers, most of the conversation is about getting anything at all in at breakfast, whether that's eggs on toast or a protein shake in the mornings they'd otherwise leave the house with nothing.

When someone asks me what to take, my answer is that it depends on what's behind the difficulty focusing, and that the eating pattern usually matters more than anything in a bottle. Of the nutrients covered above, omega-3 is the one with the most research behind it for general brain health”

Where to get information and help in Australia

How we researched and reviewed this article

We used peer-reviewed reviews and controlled trials from PubMed, plus the Australian clinical practice guideline for ADHD. Every source is listed below with a link, so you can read the original. We review this article at least every 12 months, or sooner if important new evidence appears.

About the author

Christina Hanley is a qualified nutritionist with eight years of clinical experience and leads health content at Mr Vitamins. She holds a Bachelor of Health Science (Nutritional Medicine) from Endeavour College and is a member of the Australian Natural Therapists Association (ANTA member #20854). Her clinical focus is women's health, along with skin health, energy, immunity and stress management. Her work sits where clinical nutrition meets health education: translating research into practical advice so people understand why something is recommended, not just what to take.

About the reviewer

Adrian Reynardi is a degree-qualified naturopath with six years of clinical practice, and manages the Mr Vitamins World Square store. He holds a Bachelor of Health Science (Naturopathy) and a Graduate Diploma in Management, and is a member of the Australian Traditional-Medicine Society (ATMS member #54454). He works with customers on immune health, energy, stress and gut health most days. He reviewed this article against the studies cited, with particular attention to the sections covering nutrients taken alongside prescribed medication.

References

Disclaimer

This article is general information only and does not take account of your individual circumstances. It is not intended to diagnose, treat, cure or prevent any disease or condition, including ADHD. Vitamin and mineral supplements should not replace a balanced diet. Always read the label and follow the directions for use. If symptoms persist, or before starting any supplement, particularly alongside prescribed medication, talk to your doctor, pharmacist or another qualified health professional.