Popular Conditions & Diets
Attention-deficit/hyperactivity disorder (ADHD) is one of the most common neurodevelopmental conditions in children and adolescents, affecting an estimated 5-7 per cent of school-aged kids worldwide. Symptoms typically include inattention, hyperactivity, impulsivity, or some combination of all three.
Today, it’s generally recognized that ADHD is influenced by a combination of genetic, neurological, and environmental factors affecting brain function and behaviour. The role of nutrition is emphasized by some and minimized by others, but no one denies that it may play an important role in influencing symptom severity, cognitive function, behaviour, and overall quality of life.
The key question is not whether diet causes ADHD (it doesn’t), but whether dietary changes can help improve symptoms and support better brain health.
The short answer is no, there is currently no evidence that diet alone causes ADHD. However, dietary patterns appear to matter. Multiple studies have found that children with ADHD are more likely to consume a Western-style dietary pattern characterized by higher intakes of refined carbohydrates, sugary foods, fast food, saturated fat, and ultra-processed foods. In contrast, healthier dietary patterns rich in vegetables, fruits, fish, legumes, and minimally processed foods are often associated with fewer ADHD symptoms.
However, this may be a ‘chicken and egg’ situation. One Spanish study involving 259 preschool children found that children with ADHD were significantly less likely to follow a healthy dietary pattern and significantly more likely to consume a Western-style diet. Children with inattentive ADHD showed particularly low adherence to healthy eating patterns.
Researchers have also explored the role of sugar, with mixed findings. For example, a Brazilian birth cohort study following almost 3,000 kids found no association between long-term sugar consumption and ADHD diagnosis, suggesting that higher sugar intake may sometimes be a consequence rather than a cause of ADHD.
On the other hand, a large meta-analysis comprised of nearly 26,000 kids linked high sugar intake to greater hyperactivity, inattention, and ADHD-related behavioural problems. For whatever it's worth, animal research has also shown that long-term high-sugar diets can produce hyperactivity and cognitive deficits.
The most likely explanation is that ADHD is influenced not by a single nutrient, but by overall dietary patterns and lifestyle factors, with nutrition affecting symptoms rather than acting alone.
Rather than focusing on key nutrients to include or avoid, the evidence points toward building a generally nutrient-dense dietary pattern.
Protein-Rich Foods
Children with ADHD seem to consume less protein and fewer essential nutrients than their peers. In one case-control study, children with ADHD consumed significantly more sugar and significantly less protein, vitamin C, calcium, zinc, and several B vitamins than controls.
A great way to balance insulin and support mental focus is ensuring regular protein intake throughout the day, and especially at breakfast. Protein-rich foods naturally contain vitamins and minerals and help support stable blood sugar levels while providing the amino acids needed for neurotransmitter production.
Examples include:
Fish and Omega-3-Rich Foods
Omega-3 fatty acids play important roles in brain structure and function. The research on omega-3 supplements is not a slam dunk; some trials show modest benefits, and others find little effect. It’s possible that only kids who start from a place of omega-3 deficiency stand to benefit. Still, Mediterranean dietary patterns rich in fatty fish have been associated with a lower likelihood of ADHD and better behavioural outcomes.
Two to three times per week, aim to include fatty fish such as:
Many observational studies have linked higher intakes of vegetables, fruits, and phytochemical-rich foods to lower risk of ADHD and symptom burden. These patterns are associated with reduced ADHD symptoms, while sweet dietary patterns are associated with increased risk.
These foods provide fibre, vitamins, minerals, antioxidants, and polyphenols that support overall brain and metabolic health.
Sugar-Sweetened Beverages
Even researchers who disagree about sugar's role in ADHD generally agree on one thing: sugary drinks are worth limiting. A 2016 controlled study of over 300 kids found a clear dose-dependent response: kids who drank seven or more servings of sugar-sweetened beverages per week had almost four times the odds of an ADHD diagnosis compared to kids who drank none.
Reducing the presence of soft drinks, energy drinks, sweetened teas, and sugar-sweetened fruit juices in the home may be one of the simplest and most impactful dietary changes a family can make.
Ultra-Processed Foods
Ultra-processed foods (UPFs) often combine refined carbohydrates, added sugars, artificial additives, and highly palatable ingredients into addictive, dopamine-stimulating combinations. It seems fair to say that the Western-style dietary patterns associated with increased ADHD symptoms are generally high in packaged UPFs that represent commonly available convenience foods. However, it remains something of a mystery as to which components, such as seed oils, sugars, preservatives, removal of fibre, or processing methods, might be relevant to health outcomes, including ADHD and beyond.
Artificial Food Colours and Additives
One of the most controversial areas of ADHD nutrition research involves artificial food colours.
A large review of dietary intervention studies found that targeted elimination diets reducing synthetic food colours, flavours, and other additives improved hyperactive symptoms in a significant subgroup of children with ADHD.
One meta-analysis estimated that among children with ADHD, roughly 8 per cent may be particularly sensitive to synthetic food colours.
So while food dyes do not seem to be a major ‘smoking gun’ for ADHD, and may not even be relevant for most children, a subset may indeed benefit from reducing artificial colours and additives.
If you're looking for a simple starting point, the scientific consensus clearly supports focusing on dietary patterns rather than individual nutrients. Small, consistent dietary changes are likely to have a greater impact than elimination diets, fixation on specific nutrients, or supplements.
Some great places to start include:
Nutrition is unlikely to be either the sole cause or sole solution for ADHD. However, growing evidence suggests that diet quality influences brain health, behaviour, and symptom severity, making nutrition a meaningful part of symptom support.
The strongest nutrition strategies also happen to be the simplest: try to eat more colourful whole foods, prioritize protein, reduce sugar-sweetened beverages, reduce UPFs where possible, and embrace healthy fats as per the Mediterranean diet. In other words, a generally healthy eating pattern is also likely to be beneficial for ADHD.
And while nutritional interventions won’t eliminate the condition, they can help create a healthier foundation on which every other treatment strategy can work more effectively.
Does sugar cause ADHD? Current evidence does not support sugar as the sole cause of ADHD. However, high sugar intake may worsen symptoms in some individuals and is associated with poorer overall dietary quality.
What is the best diet for ADHD? There is no single ADHD diet. However, dietary patterns rich in protein, fish, fruits, vegetables, legumes, and minimally processed foods appear to be consistent with better outcomes.
Are food dyes linked to ADHD? Possibly for a subset of children. Research suggests some children may be particularly sensitive to synthetic food colours and preservatives.
Should people with ADHD take omega-3 supplements? The evidence is mixed. Some studies show modest benefits, while others show little effect. Including fatty fish in the diet remains a practical first step with no downsides.
Can nutrition replace ADHD medication? Nutrition can be an important part of ADHD management, but it should not be viewed as a replacement for evidence-based medical care. The most effective approach is often a comprehensive plan that includes lifestyle, nutrition, behavioural strategies, and medical support when needed.
ADHD diet for adults: Foods to eat and avoid - adda - attention deficit disorder association. Attention Deficit Disorder Association. (n.d.). https://add.org/adhd-diet/
ADHD diet for kids: 7 reasons to say no to Soda. Psychiatry Redefined. (n.d.). https://www.psychiatryredefined.org/adhd-diet-children-soda-sugar/
Ai, Y., Zhao, J., Liu, H., Li, J., & Zhu, T. (2022). The relationship between diabetes mellitus and attention deficit hyperactivity disorder: A systematic review and meta-analysis. Frontiers in Pediatrics, 10. https://doi.org/10.3389/fped.2022.936813
Beecher, K., Alvarez Cooper, I., Wang, J., Walters, S. B., Chehrehasa, F., Bartlett, S. E., & Belmer, A. (2021). Long-term overconsumption of sugar starting at adolescence produces persistent hyperactivity and neurocognitive deficits in adulthood. Frontiers in Neuroscience, 15. https://doi.org/10.3389/fnins.2021.670430
Benton, D. (2007). The impact of diet on anti-social, violent and criminal behaviour. Neuroscience & Biobehavioral Reviews, 31(5), 752–774. https://doi.org/10.1016/j.neubiorev.2007.02.002
Dehnavi, A. Z., Zhang-James, Y., Draytsel, D., Carguello, B., Faraone, S. V., & Weinstock, R. S. (2023). Association of ADHD symptoms with type 2 diabetes and cardiovascular comorbidities in adults receiving outpatient diabetes care. Journal of Clinical & Translational Endocrinology, 32, 100318. https://doi.org/10.1016/j.jcte.2023.100318
Del-Ponte, B., Quinte, G. C., Cruz, S., Grellert, M., & Santos, I. S. (2019). Dietary patterns and attention deficit/hyperactivity disorder (ADHD): A systematic review and meta-analysis. Journal of Affective Disorders, 252, 160–173. https://doi.org/10.1016/j.jad.2019.04.061
Farsad-Naeimi, A., Asjodi, F., Omidian, M., Askari, M., Nouri, M., Pizarro, A. B., & Daneshzad, E. (2020). Sugar consumption, sugar sweetened beverages and attention deficit hyperactivity disorder: A systematic review and meta-analysis. Complementary Therapies in Medicine, 53, 102512. https://doi.org/10.1016/j.ctim.2020.102512
Foods that feed your ADHD mind. UCLA health. (n.d.). https://www.uclahealth.org/news/article/foods-feed-your-adhd-mind
Hawkey, E., & Nigg, J. T. (2014). Omega − 3 fatty acid and ADHD: Blood level analysis and meta-analytic extension of supplementation trials. Clinical Psychology Review, 34(6), 496–505. https://doi.org/10.1016/j.cpr.2014.05.005
Hemamy, M., Heidari-Beni, M., Askari, G., Karahmadi, M., & Maracy, M. (2020a). Effect of vitamin D and magnesium supplementation on behavior problems in children with attention-deficit hyperactivity disorder. International Journal of Preventive Medicine, 11(1). https://doi.org/10.4103/ijpvm.ijpvm_546_17
Hemamy, M., Heidari-Beni, M., Askari, G., Karahmadi, M., & Maracy, M. (2020b). Effect of vitamin D and magnesium supplementation on behavior problems in children with attention-deficit hyperactivity disorder. International Journal of Preventive Medicine, 11(1). https://doi.org/10.4103/ijpvm.ijpvm_546_17
Hontelez, S., Stobernack, T., Pelsser, L. M., van Baarlen, P., Frankena, K., Groefsema, M. M., Kleerebezem, M., Rodrigues Pereira, R., Postma, E. M., Smeets, P. A., Stopyra, M. A., Zwiers, M. P., & Aarts, E. (2021). Correlation between brain function and ADHD symptom changes in children with ADHD following a few-foods diet: An open-label intervention trial. Scientific Reports, 11(1). https://doi.org/10.1038/s41598-021-01684-7
How nutrition harmonizes the ADHD brain. (n.d.-a). https://www.additudemag.com/nutrition-harmonizes-adhd-brain/
Howard, A. L., Robinson, M., Smith, G. J., Ambrosini, G. L., Piek, J. P., & Oddy, W. H. (2010). ADHD is associated with a “western” dietary pattern in adolescents. Journal of Attention Disorders, 15(5), 403–411. https://doi.org/10.1177/1087054710365990
Hunter, C., Smith, C., Davies, E., Dyall, S. C., & Gow, R. V. (2025). A closer look at the role of nutrition in children and adults with ADHD and neurodivergence. Frontiers in Nutrition, 12. https://doi.org/10.3389/fnut.2025.1586925
Kilic, E. B., & Koksal, E. (2024). The interaction between attention deficit and hyperactivity disorder and Nutrition. Current Nutrition Reports, 14(1). https://doi.org/10.1007/s13668-024-00592-2
Landau, Z., & Pinhas-Hamiel, O. (2019). Attention deficit/hyperactivity, the metabolic syndrome, and type 2 diabetes. Current Diabetes Reports, 19(8). https://doi.org/10.1007/s11892-019-1174-x
Lange, K. W., Lange, K. M., Nakamura, Y., & Reissmann, A. (2023). Nutrition in the management of ADHD: A review of recent research. Current Nutrition Reports, 12(3), 383–394. https://doi.org/10.1007/s13668-023-00487-8
Li, L., Taylor, M. J., Bälter, K., Kuja‐Halkola, R., Chen, Q., Hegvik, T., Tate, A. E., Chang, Z., Arias‐Vásquez, A., Hartman, C. A., & Larsson, H. (2020). Attention‐deficit/hyperactivity disorder symptoms and dietary habits in adulthood: A large population‐based twin study in Sweden. American Journal of Medical Genetics Part B: Neuropsychiatric Genetics, 183(8), 475–485. https://doi.org/10.1002/ajmg.b.32825
Lien, L., Lien, N., Heyerdahl, S., Thoresen, M., & Bjertness, E. (2006). Consumption of soft drinks and hyperactivity, mental distress, and conduct problems among adolescents in Oslo, Norway. American Journal of Public Health, 96(10), 1815–1820. https://doi.org/10.2105/ajph.2004.059477
Lukovac, T., Hil, O. A., Popović, M., Savić, T., Pavlović, A. M., & Pavlović, D. (2024). Serum levels of glucose, thyroid stimulating hormone, and free thyroxine in boys diagnosed with attention deficit hyperactivity disorder: A cross-sectional pilot study. BMC Neurology, 24(1). https://doi.org/10.1186/s12883-024-03563-w
Marcelli, I., Capece, U., & Caturano, A. (2025). Bridging ADHD and metabolic disorders: Insights into shared mechanisms and clinical implications. Diabetology, 6(5), 40. https://doi.org/10.3390/diabetology6050040
Nigg, J. T., Lewis, K., Edinger, T., & Falk, M. (2012). Meta-analysis of attention-deficit/hyperactivity disorder or attention-deficit/hyperactivity disorder symptoms, restriction diet, and synthetic food color additives. Journal of the American Academy of Child & Adolescent Psychiatry, 51(1). https://doi.org/10.1016/j.jaac.2011.10.015
Nutrition and ADHD. Chadd. (n.d.). https://chadd.org/about-adhd/nutrition-and-adhd/
Pei-Chen Chang, J. (2021). Personalised medicine in child and adolescent psychiatry: Focus on omega-3 polyunsaturated fatty acids and ADHD. Brain, Behavior, & Immunity - Health, 16, 100310. https://doi.org/10.1016/j.bbih.2021.100310
Pinto, S., Correia-de-Sá, T., Sampaio-Maia, B., Vasconcelos, C., Moreira, P., & Ferreira-Gomes, J. (2022). Eating patterns and dietary interventions in ADHD: A narrative review. Nutrients, 14(20), 4332. https://doi.org/10.3390/nu14204332
Rambler, R. M., Rinehart, E., Boehmler, W., Gait, P., Moore, J., Schlenker, M., & Kashyap, R. (2022). A review of the Association of Blue Food Coloring with attention deficit hyperactivity disorder symptoms in children. Cureus. https://doi.org/10.7759/cureus.29241
Razavinia, F., Ebrahimiyan, A., Faal Siahkal, S., Ghazinezhad, N., & Abedi, P. (2024). Vitamins B9 and B12 in children with attention deficit hyperactivity disorder (ADHD). International Journal for Vitamin and Nutrition Research, 94(5–6), 476–484. https://doi.org/10.1024/0300-9831/a000809
Resources :: Resources :: Cumbria, Northumberland, Tyne and Wear NHS Foundation Trust. (n.d.-b). https://www.cntw.nhs.uk/resources
Rojo-Marticella, M., Arija, V., Alda, J. Á., Morales-Hidalgo, P., Esteban-Figuerola, P., & Canals, J. (2022). Do children with attention-deficit/hyperactivity disorder follow a different dietary pattern than that of their control peers? Nutrients, 14(6), 1131. https://doi.org/10.3390/nu14061131
Salari, N., Ghasemi, H., Abdoli, N., Rahmani, A., Shiri, M. H., Hashemian, A. H., Akbari, H., & Mohammadi, M. (2023). The global prevalence of ADHD in children and adolescents: A systematic review and meta-analysis. Italian Journal of Pediatrics, 49(1). https://doi.org/10.1186/s13052-023-01456-1
Salvat, H., Mohammadi, M. N., Molavi, P., Mostafavi, S. A., Rostami, R., & Salehinejad, M. A. (2022). Nutrient intake, dietary patterns, and anthropometric variables of children with ADHD in comparison to healthy controls: A case-control study. BMC Pediatrics, 22(1). https://doi.org/10.1186/s12887-022-03123-6
Schwartz, D. L., Gilstad-Hayden, K., Carroll-Scott, A., Grilo, S. A., McCaslin, C., Schwartz, M., & Ickovics, J. R. (2015). Energy Drinks and youth self-reported hyperactivity/inattention symptoms. Academic Pediatrics, 15(3), 297–304. https://doi.org/10.1016/j.acap.2014.11.006
Shareghfarid, E., Sangsefidi, Z. S., Salehi-Abargouei, A., & Hosseinzadeh, M. (2020). Empirically derived dietary patterns and food groups intake in relation with attention deficit/hyperactivity disorder (ADHD): A systematic review and meta-analysis. Clinical Nutrition ESPEN, 36, 28–35. https://doi.org/10.1016/j.clnesp.2019.10.013
Side effects of ADHD medication - child mind institute. Child Mind Institute. (n.d.). https://childmind.org/article/side-effects-of-adhd-medication/
Stevens, L. J., Kuczek, T., Burgess, J. R., Hurt, E., & Arnold, L. E. (2010). Dietary sensitivities and ADHD symptoms: Thirty-five years of research. Clinical Pediatrics, 50(4), 279–293. https://doi.org/10.1177/0009922810384728
What we know about ADHD and food - child mind institute. (n.d.-c). https://childmind.org/article/what-we-know-about-adhd-and-food/
Yu, C.-J., Du, J.-C., Chiou, H.-C., Feng, C.-C., Chung, M.-Y., Yang, W., Chen, Y.-S., Chien, L.-C., Hwang, B., & Chen, M.-L. (2016). Sugar-sweetened beverage consumption is adversely associated with childhood attention deficit/hyperactivity disorder. International Journal of Environmental Research and Public Health, 13(7), 678. https://doi.org/10.3390/ijerph13070678
Zare Dehnavi, A., Elmitwalli, I., Alsharif, H. O. H., Shervin Razavi, A., Gumpel, T. A., Smith, A., Weinstock, R. S., Faraone, S. V., & Zhang-James, Y. (2024). Effects of ADHD and ADHD treatment on glycemic management in type 1 diabetes: A systematic review and meta-analysis of observational studies. Diabetes Research and Clinical Practice, 209, 111566. https://doi.org/10.1016/j.diabres.2024.111566
Zhang, Y., Gui, Z., Jiang, N., Pu, X., Liu, M., Pu, Y., Huang, S., Huang, S., & Chen, Y. (2023). Association between hyperactivity and SSB consumption in schoolchildren: A cross-sectional study in China. Nutrients, 15(4), 1034. https://doi.org/10.3390/nu15041034
Lead photo by THE ORGANIC CRAVE Ⓡ on Unsplash.
Share this article
