Best Supplements for ADHD

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ADHD can feel like a constant tug-of-war, especially for parents. On one hand, you want to help your child focus, stay calm, and succeed in daily life. On the other, it’s completely normal to worry about ADHD medications—the potential side effects, long-term use, and whether they’re truly the right choice for your child. If you’ve ever felt caught in the middle, you’re not alone. Many families face this same uncertainty when exploring ADHD treatment options.

In this guide, we’ll walk through some of the most researched supplements for ADHD in children. We’ll look at what the evidence actually says, what benefits you can realistically expect, and how these supplements might fit into a broader ADHD treatment plan.

Possible Benefits for ADHD

Fish Oil

Fish oil is one of the most widely discussed natural supplements for ADHD. It contains omega-3 fatty acids, including DHA, which plays an important role in brain function. Research has shown that children with ADHD often have lower levels of DHA, which is why fish oil has gained so much attention. Some studies suggest it can help improve attention, behavior, and cognitive function. However, it’s important to set realistic expectations—the benefits are usually modest and take time to show up, often around four months or more. Interestingly, full-spectrum fish oil tends to work better than taking DHA alone, likely because of the combination of fatty acids working together.

Multivitamin

Multivitamins are another common starting point for parents looking into natural ADHD support. They’re easy to use and generally safe, and some research suggests they may help with overall functioning, attention, and mood—particularly issues like irritability or aggression. That said, they don’t appear to have much impact on core symptoms like hyperactivity or impulsivity. What’s also worth noting is that improvements can be subtle. In some studies, clinicians observed positive changes, while parents didn’t notice much day-to-day difference. This suggests that multivitamins may offer gradual, long-term support rather than quick, noticeable results.

Vitamin D

Vitamin D has also been studied in relation to ADHD, although mostly as an add-on to medication rather than a standalone treatment. It seems to be most beneficial for children who already have low vitamin D levels. In one small study, children who took vitamin D alongside their medication experienced better symptom control later in the day. While some clinical guidelines suggest using vitamin D in cases of deficiency, it’s generally not considered a primary treatment for ADHD on its own.

Zinc

Zinc is another nutrient that’s getting increasing attention in ADHD research. Studies have found that children with ADHD are more likely to have lower zinc levels, which may even affect how well they respond to medication. Supplementing with zinc has been shown to produce small improvements in overall symptoms, particularly in children who are deficient. It may be especially helpful for kids with certain nutritional imbalances or those who are overweight, where deficiencies are more common.

Weak Benefits for ADHD

Ginkgo biloba

Ginkgo biloba is sometimes explored as a natural option for supporting attention, particularly when used alongside standard ADHD medications. Some evidence suggests it may provide a small boost in attention and cognitive performance when combined with conventional treatment. However, it’s important to keep expectations in check—ginkgo is significantly less effective than established medications like methylphenidate. While it may have a supporting role, it’s not a replacement for evidence-based ADHD therapies.

L-Carnitine

L-carnitine is one supplement that has been explored in ADHD research, mostly in small studies involving boys. Some findings suggest it may help improve behavior, based on reports from both parents and teachers. That said, the evidence is still limited, so it’s too early to draw strong conclusions about how effective it is for ADHD in children.

L-theanine and Melatonin

When it comes to L-theanine and melatonin, these supplements are used more for sleep support than for treating core ADHD symptoms. L-theanine may help improve sleep quality and support certain aspects of cognitive function, which can indirectly benefit children with ADHD. Melatonin, on the other hand, is often helpful for kids who struggle with insomnia or have difficulty falling asleep. However, it’s important to note that neither supplement appears to significantly improve the main symptoms of ADHD, such as inattention or hyperactivity.

Magnesium

Magnesium is frequently discussed as a natural ADHD supplement, but its effectiveness largely depends on whether a child is actually deficient. Research shows that children with ADHD often have lower magnesium levels in their blood and even in their hair. In one small study, children who were deficient and supplemented with magnesium experienced improvements in hyperactivity. However, if magnesium levels are already normal, supplementation doesn’t seem to improve attention or hyperactivity—though it may still offer a mild benefit for mood or irritability.

Phosphatidylserine

Phosphatidylserine, a type of fatty acid, has also been studied for its potential role in ADHD. A few small studies in children suggest it may help improve attention and reduce hyperactivity. Still, the research is in its early stages, so more evidence is needed before it can be widely recommended as part of ADHD treatment.

Pycnogenol

Another supplement that’s gained attention is Pycnogenol, a specific extract from maritime pine bark. Early research in children with ADHD shows that it may help improve attention and reduce hyperactivity scores. While these results are promising, they’re still considered preliminary and need to be confirmed in larger, more rigorous studies.

Unlikely Benefits for ADHD

Iron

On the flip side, some supplements are often recommended for ADHD but don’t hold up well under closer scientific scrutiny. Iron is a good example. While children with ADHD are more likely to have low iron levels, and iron deficiency is often seen alongside ADHD, supplementing with iron doesn’t appear to improve core symptoms like inattention or hyperactivity—even in children who are deficient. So although low iron is associated with ADHD, there’s little evidence to suggest it actually causes or worsens the condition’s main symptoms.

Phenylalanine and Tyrosine

A similar pattern shows up with certain amino acids, such as phenylalanine and tyrosine. Some studies have found lower levels of these amino acids in individuals with ADHD, which initially made them promising candidates for supplementation. However, research has not shown meaningful or lasting improvements in ADHD symptoms when these supplements are used. In practice, they don’t appear to make a noticeable difference in attention, behavior, or overall symptom control.

Challenges to ADHD Treatment

Treating ADHD in children is rarely straightforward, and one of the biggest challenges starts with diagnosis. Unlike many medical conditions, ADHD isn’t confirmed with a lab test—it’s based on observed behavior. Clinicians have to carefully rule out other factors, such as anxiety, learning difficulties, or environmental influences at home and school. Naturally, this creates some uncertainty. Traits like high energy, impulsivity, and short attention spans can sometimes be completely normal for kids, yet still be labeled as ADHD. This gray area is a major reason why many parents feel uneasy about the diagnosis.

There are also valid concerns when it comes to conventional ADHD treatment, particularly medications. Stimulant medications are among the most effective options available and can make a meaningful difference for many children. However, they’re not without drawbacks. Common side effects include reduced appetite, sleep issues, and increased heart rate. In some cases, parents worry that medication may dampen their child’s personality or emotional expression. There’s also the concern that medication becomes a shortcut, replacing other important strategies like classroom support, structure, and effective parenting approaches, which are essential for long-term success.

Dr. Brian’s Verdict

Many families turn to natural supplements for ADHD as a gentler alternative, but these come with their own limitations. Most supplements offer modest or inconsistent benefits and generally don’t match the effectiveness of medication for core ADHD symptoms. Often, they target just one aspect—such as attention, mood, or sleep—rather than addressing the full picture. They also take time to work, and any improvements tend to be subtle, which can make them easy to overlook in daily life.

That said, supplements can still play a helpful role in a well-rounded ADHD treatment plan. It’s best to think of them as supportive tools rather than standalone solutions. When used alongside other approaches, they can help fill in gaps—especially if a child has underlying nutrient deficiencies. Options like multivitamins, omega-3 fatty acids, magnesium, and zinc may offer small improvements in ADHD symptoms or at least support overall health, which still matters. If you’re hesitant about medication, supplements can be a reasonable place to start—as long as expectations stay realistic. On their own, they’re unlikely to create major changes in moderate to severe ADHD, but as part of a broader strategy, they can provide meaningful support.

Top supplement choices

Fish oil (EPA) – 1 to 4 caps / day
Ginkgo (Egb 761) – 1 cap / day
Ginkgo (generic) – 1 cap / day
Iron bisglycinate – 1 cap / day
L-Carnitine (caps) – 2 to 4 caps / day
L-Carnitine (powder) – 2 to 4 scoops / day
L-Theanine – 2 to 4 lozenge / day
Magnesium Citrate – 1 to 4 caps / day
Magnesium Glycinate – 1 to 4 caps / day
Magnesium Malate – 2 to 6 caps / day
Magnesium Threonate – 3 to 6 caps / day
Melatonin (1 mg) – 1 cap before bed
Melatonin (3 mg) – 1 cap before bed
Melatonin (5 mg) – 1 cap before bed
Multivitamin (men) – 1 cap / day
Multivitamin (women) – 1 cap / day
Phosphatidylserine (generic) – 1 to 3 caps / day
Phosphatidylserine (Neuriva) – 1 cap / day
Pycnogenol – 1 to 3 caps / day
Vitamin D (caps) – 1 to 2 caps / day
Vitamin D (drops) – 1 to 2 drops / day
Zinc (lozenge) – 1 lozenge / day
Zinc citrate (caps) – 1 cap / day

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Citations

Bekaroğlu M, Aslan Y, Gedik Y, Değer O, Mocan H, Erduran E, Karahan C. Relationships between serum free fatty acids and zinc, and attention deficit hyperactivity disorder: a research note. J Child Psychol Psychiatry. 1996 Feb;37(2):225-7. doi: 10.1111/j.1469-7610.1996.tb01395.x. PMID: 8682903.

Bilici M, Yildirim F, Kandil S, Bekaroğlu M, Yildirmiş S, Değer O, Ulgen M, Yildiran A, Aksu H. Double-blind, placebo-controlled study of zinc sulfate in the treatment of attention deficit hyperactivity disorder. Prog Neuropsychopharmacol Biol Psychiatry. 2004 Jan;28(1):181-90. doi: 10.1016/j.pnpbp.2003.09.034. PMID: 14687872.

Bornstein RA, Baker GB, Carroll A, King G, Wong JT, Douglass AB. Plasma amino acids in attention deficit disorder. Psychiatry Res. 1990 Sep;33(3):301-6. doi: 10.1016/0165-1781(90)90046-8. PMID: 2243904.

Bruton A, Nauman J, Hanes D, Gard M, Senders A. Phosphatidylserine for the Treatment of Pediatric Attention-Deficit/Hyperactivity Disorder: A Systematic Review and Meta-Analysis. J Altern Complement Med. 2021 Apr;27(4):312-322. doi: 10.1089/acm.2020.0432. Epub 2021 Feb 4. PMID: 33539192; PMCID: PMC9208377.

Crippa A, Tesei A, Sangiorgio F, Salandi A, Trabattoni S, Grazioli S, Agostoni C, Molteni M, Nobile M. Behavioral and cognitive effects of docosahexaenoic acid in drug-naïve children with attention-deficit/hyperactivity disorder: a randomized, placebo-controlled clinical trial. Eur Child Adolesc Psychiatry. 2019 Apr;28(4):571-583. doi: 10.1007/s00787-018-1223-z. Epub 2018 Sep 24. PMID: 30246216.

Eisenberg J, Asnis GM, van Praag HM, Vela RM. Effect of tyrosine on attention deficit disorder with hyperactivity. J Clin Psychiatry. 1988 May;49(5):193-5. PMID: 3284877.

Elliott SD, Vickers ML, McKeon G, Eriksson L, Malacova E, Scott JG. Iron Supplementation in Management of Neurodevelopmental Disorders: Systematic Review, Meta-Analysis, and Qualitative Synthesis. J Neuropsychiatry Clin Neurosci. 2024 Summer;36(3):178-186. doi: 10.1176/appi.neuropsych.20230081. Epub 2024 Feb 12. PMID: 38343311.

Gillies D, Leach MJ, Perez Algorta G. Polyunsaturated fatty acids (PUFA) for attention deficit hyperactivity disorder (ADHD) in children and adolescents. Cochrane Database Syst Rev. 2023 Apr 14;4(4):CD007986. doi: 10.1002/14651858.CD007986.pub3. PMID: 37058600; PMCID: PMC10103546.

Hemamy M, Pahlavani N, Amanollahi A, Islam SMS, McVicar J, Askari G, Malekahmadi M. The effect of vitamin D and magnesium supplementation on the mental health status of attention-deficit hyperactive children: a randomized controlled trial. BMC Pediatr. 2021 Apr 17;21(1):178. doi: 10.1186/s12887-021-02631-1. Erratum in: BMC Pediatr. 2021 May 12;21(1):230. doi: 10.1186/s12887-021-02683-3. PMID: 33865361; PMCID: PMC8052751.

Huang YH, Zeng BY, Li DJ, Cheng YS, Chen TY, Liang HY, Yang WC, Lin PY, Chen YW, Tseng PT, Lin CH. Significantly lower serum and hair magnesium levels in children with attention deficit hyperactivity disorder than controls: A systematic review and meta-analysis. Prog Neuropsychopharmacol Biol Psychiatry. 2019 Mar 2;90:134-141. doi: 10.1016/j.pnpbp.2018.11.012. Epub 2018 Nov 26. PMID: 30496768.

Johnstone JM, Hatsu I, Tost G, Srikanth P, Eiterman LP, Bruton AM, Ast HK, Robinette LM, Stern MM, Millington EG, Gracious BL, Hughes AJ, Leung BMY, Arnold LE. Micronutrients for Attention-Deficit/Hyperactivity Disorder in Youths: A Placebo-Controlled Randomized Clinical Trial. J Am Acad Child Adolesc Psychiatry. 2022 May;61(5):647-661. doi: 10.1016/j.jaac.2021.07.005. Epub 2021 Jul 22. Erratum in: J Am Acad Child Adolesc Psychiatry. 2022 Aug;61(8):1066. doi: 10.1016/j.jaac.2022.04.021. Erratum in: J Am Acad Child Adolesc Psychiatry. 2023 May;62(5):607. doi: 10.1016/j.jaac.2022.12.009. Erratum in: J Am Acad Child Adolesc Psychiatry. 2023 Nov;62(11):1276. doi: 10.1016/j.jaac.2023.07.995. PMID: 34303786; PMCID: PMC8782920.

Konofal E, Lecendreux M, Deron J, Marchand M, Cortese S, Zaïm M, Mouren MC, Arnulf I. Effects of iron supplementation on attention deficit hyperactivity disorder in children. Pediatr Neurol. 2008 Jan;38(1):20-6. doi: 10.1016/j.pediatrneurol.2007.08.014. PMID: 18054688.

Liu TH, Wu JY, Huang PY, Lai CC, Chang JP, Lin CH, Su KP. Omega-3 Polyunsaturated Fatty Acids for Core Symptoms of Attention-Deficit/Hyperactivity Disorder: A Meta-Analysis of Randomized Controlled Trials. J Clin Psychiatry. 2023 Aug 30;84(5):22r14772. doi: 10.4088/JCP.22r14772. PMID: 37656283.

Lyon MR, Kapoor MP, Juneja LR. The effects of L-theanine (Suntheanine®) on objective sleep quality in boys with attention deficit hyperactivity disorder (ADHD): a randomized, double-blind, placebo-controlled clinical trial. Altern Med Rev. 2011 Dec;16(4):348-54. PMID: 22214254.

Mohammadpour N, Jazayeri S, Tehrani-Doost M, Djalali M, Hosseini M, Effatpanah M, Davari-Ashtiani R, Karami E. Effect of vitamin D supplementation as adjunctive therapy to methylphenidate on ADHD symptoms: A randomized, double blind, placebo-controlled trial. Nutr Neurosci. 2018 Apr;21(3):202-209. doi: 10.1080/1028415X.2016.1262097. Epub 2016 Dec 7. PMID: 27924679.

Richardson AJ, Puri BK. A randomized double-blind, placebo-controlled study of the effects of supplementation with highly unsaturated fatty acids on ADHD-related symptoms in children with specific learning difficulties. Prog Neuropsychopharmacol Biol Psychiatry. 2002 Feb;26(2):233-9. doi: 10.1016/s0278-5846(01)00254-8. PMID: 11817499.

Rucklidge JJ, Eggleston MJF, Johnstone JM, Darling K, Frampton CM. Vitamin-mineral treatment improves aggression and emotional regulation in children with ADHD: a fully blinded, randomized, placebo-controlled trial. J Child Psychol Psychiatry. 2018 Mar;59(3):232-246. doi: 10.1111/jcpp.12817. Epub 2017 Oct 2. PMID: 28967099; PMCID: PMC7779340.

Salehi B, Imani R, Mohammadi MR, Fallah J, Mohammadi M, Ghanizadeh A, Tasviechi AA, Vossoughi A, Rezazadeh SA, Akhondzadeh S. Ginkgo biloba for attention-deficit/hyperactivity disorder in children and adolescents: a double blind, randomized controlled trial. Prog Neuropsychopharmacol Biol Psychiatry. 2010 Feb 1;34(1):76-80. doi: 10.1016/j.pnpbp.2009.09.026. Epub 2009 Oct 5. PMID: 19815048.

Sarris J, Ravindran A, Yatham LN, Marx W, Rucklidge JJ, McIntyre RS, Akhondzadeh S, Benedetti F, Caneo C, Cramer H, Cribb L, de Manincor M, Dean O, Deslandes AC, Freeman MP, Gangadhar B, Harvey BH, Kasper S, Lake J, Lopresti A, Lu L, Metri NJ, Mischoulon D, Ng CH, Nishi D, Rahimi R, Seedat S, Sinclair J, Su KP, Zhang ZJ, Berk M. Clinician guidelines for the treatment of psychiatric disorders with nutraceuticals and phytoceuticals: The World Federation of Societies of Biological Psychiatry (WFSBP) and Canadian Network for Mood and Anxiety Treatments (CANMAT) Taskforce. World J Biol Psychiatry. 2022 Jul;23(6):424-455. doi: 10.1080/15622975.2021.2013041. Epub 2022 Mar 21. PMID: 35311615.

Shakibaei F, Radmanesh M, Salari E, Mahaki B. Ginkgo biloba in the treatment of attention-deficit/hyperactivity disorder in children and adolescents. A randomized, placebo-controlled, trial. Complement Ther Clin Pract. 2015 May;21(2):61-7. doi: 10.1016/j.ctcp.2015.04.001. Epub 2015 Apr 18. PMID: 25925875.

Starobrat-Hermelin B, Kozielec T. The effects of magnesium physiological supplementation on hyperactivity in children with attention deficit hyperactivity disorder (ADHD). Positive response to magnesium oral loading test. Magnes Res. 1997 Jun;10(2):149-56. PMID: 9368236.

Stevens LJ, Zentall SS, Deck JL, Abate ML, Watkins BA, Lipp SR, Burgess JR. Essential fatty acid metabolism in boys with attention-deficit hyperactivity disorder. Am J Clin Nutr. 1995 Oct;62(4):761-8. doi: 10.1093/ajcn/62.4.761. PMID: 7572706.

Talebi S, Miraghajani M, Ghavami A, Mohammadi H. The effect of zinc supplementation in children with attention deficit hyperactivity disorder: A systematic review and dose-response meta‑analysis of randomized clinical trials. Crit Rev Food Sci Nutr. 2022;62(32):9093-9102. doi: 10.1080/10408398.2021.1940833. Epub 2021 Jun 29. PMID: 34184967.

Trebatická J, Kopasová S, Hradecná Z, Cinovský K, Skodácek I, Suba J, Muchová J, Zitnanová I, Waczulíková I, Rohdewald P, Duracková Z. Treatment of ADHD with French maritime pine bark extract, Pycnogenol. Eur Child Adolesc Psychiatry. 2006 Sep;15(6):329-35. doi: 10.1007/s00787-006-0538-3. Epub 2006 May 13. PMID: 16699814.

Tseng PT, Cheng YS, Yen CF, Chen YW, Stubbs B, Whiteley P, Carvalho AF, Li DJ, Chen TY, Yang WC, Tang CH, Chu CS, Yang WC, Liang HY, Wu CK, Lin PY. Peripheral iron levels in children with attention-deficit hyperactivity disorder: a systematic review and meta-analysis. Sci Rep. 2018 Jan 15;8(1):788. doi: 10.1038/s41598-017-19096-x. PMID: 29335588; PMCID: PMC5768671.

Van Oudheusden LJ, Scholte HR. Efficacy of carnitine in the treatment of children with attention-deficit hyperactivity disorder. Prostaglandins Leukot Essent Fatty Acids. 2002 Jul;67(1):33-8. doi: 10.1054/plef.2002.0378. PMID: 12213433.

Weiss MD, Wasdell MB, Bomben MM, Rea KJ, Freeman RD. Sleep hygiene and melatonin treatment for children and adolescents with ADHD and initial insomnia. J Am Acad Child Adolesc Psychiatry. 2006 May;45(5):512-519. PMID: 16670647.

Zametkin AJ, Karoum F, Rapoport JL. Treatment of hyperactive children with D-phenylalanine. Am J Psychiatry. 1987 Jun;144(6):792-4. doi: 10.1176/ajp.144.6.792. PMID: 3296793.