Supplements for ADHD: A Psychiatrist Reviews 40+ Options

Published: October 2026 | By: Dr. Baghel | Category: Adult Psychiatry

Supplements for ADHD may help some adults, especially ones that correct a nutrient you’re low on, such as iron, or that improve sleep, such as melatonin. I’m a board-certified psychiatrist, and I treat adults with ADHD across North Carolina.

Most of the research so far is in children. Adult trials exist for a few supplements, including saffron, melatonin, and a broad vitamin-and-mineral formula. In a trial of 80 adults, that formula improved self-rated and observer-rated ADHD symptoms compared with placebo (PMID: 24482441).

If you haven’t been evaluated yet, start with how an adult ADHD evaluation works in North Carolina. Peptides such as Semax have their own page on peptides with psychiatric medications.

Supplements for ADHD at a Glance

Supplement	Best study so far	Studied in adults?	Evidence level	Ask your prescriber first if you take
Iron	Low ferritin in 35.5% of 200 adults with ADHD	Yes (blood levels)	Moderate if you’re low	Thyroid medication, levodopa
Zinc	6 trials, 489 children	No	Early	Amphetamine (lower dose may be needed)
Vitamin D	4 trials added to methylphenidate	Blood levels only	Early	None well studied
Vitamin B12	Lower levels in 35 adults with ADHD	Blood levels only	Worth checking if at risk	Metformin, acid reducers
Magnesium	Combined with vitamin D in 66 children	No	Early	Some antibiotics, osteoporosis drugs
Magnesium L-threonate	Open pilot in 15 adults	Yes	Early	Same as magnesium
Magnesium + B6	40 children	No	Early	None well studied
Vitamin-mineral formula	80 adults, 8 weeks	Yes	Moderate	None well studied
L-methylfolate	44 adults on methylphenidate	Yes	No added benefit found	None well studied
Omega-3 fish oil	Cochrane review, 37 trials	No	Mixed	None well studied
Saffron	54 children vs methylphenidate; 1 adult add-on trial	Yes	Early	SSRIs, amphetamines (not yet studied together)
Caffeine	7 trials, 104 children	No	Not shown	Stimulant medication
Paraxanthine, theacrine	Small trials in healthy adults	Healthy adults only	Not yet studied for ADHD	Stimulant medication
L-theanine	98 boys, sleep quality	No	Early	None well studied
L-tyrosine	12 adults, open study	Yes	Short-lived effect	None well studied
Phenylalanine	13 adults, 2-week crossover	Yes	Short-lived effect	MAOIs; avoid with PKU
Melatonin	51 adults with a late body clock	Yes	Moderate for sleep	Fluvoxamine
Glycine	Sleep study in healthy adults	Healthy adults only	Not yet studied for ADHD	Clozapine
Lemon balm	Review of children’s trials	No	Early	None well studied
Chamomile	Anxiety trial in 57 adults	Not for ADHD	Early	Daisy-family allergy
Amber glasses	Small open study in adults	Yes	Early, for sleep	Not applicable
Ginkgo	Add-on to methylphenidate in children	No	Early	Blood thinners, SSRIs
Bacopa	112 boys; memory trials in adults	Not for ADHD	Early	None well studied
Rhodiola	60 adults with burnout	Not for ADHD	Early	Antidepressants
Korean red ginseng	70 children	No	Early	Blood thinners
Cordyceps	No ADHD studies	No	Not yet studied for ADHD	None well studied
Catuaba	Rat studies	No	Animal only	Stimulants (not yet studied together)
Oroxylin A	Rat ADHD model; 82 older adults for memory	Not for ADHD	Animal only for ADHD	Stimulants (not yet studied together)
Citicoline	75 healthy teenage boys	No	Early	None well studied
Alpha-GPC	No ADHD studies	No	Not yet studied for ADHD	None well studied
Taurine	Energy-drink study	No	Not yet studied for ADHD	None well studied
Agmatine	Rat studies	No	Animal only	None well studied
Lion’s mane	41 healthy adults	Healthy adults only	Not yet studied for ADHD	None well studied
Ashwagandha	No ADHD trials	No	Not yet studied for ADHD	None well studied (rare liver injury reported)
CoQ10	60 children added to atomoxetine	No	Early	None well studied
Thiamine (B1), riboflavin (B2)	No ADHD trials	No	Not yet studied for ADHD	None well studied
Biotin	No ADHD trials	No	Not yet studied for ADHD	Tell whoever orders your labs
Grounding	12-person sleep study	Not for ADHD	Not yet studied for ADHD	Not applicable
DMAE (deanol)	Former prescription drug, withdrawn in 1983	No	Not shown	None well studied
Mucuna pruriens	No ADHD studies	No	Not yet studied for ADHD	MAOI antidepressants, antipsychotics
PEA, hordenine	No ADHD studies	No	Not yet studied for ADHD	MAOI antidepressants
St John’s wort	54 children, JAMA trial	No	No benefit found	SSRIs and many other medications

Vitamins and Minerals for ADHD

Iron

Low iron is common in adults with ADHD. In a study of 200 adults, 35.5% had a ferritin under 50 ng/mL, and low iron was more common in those who also had restless legs (PMID: 30722056).

In a small trial of 23 children with low ferritin, ADHD rating scores improved over 12 weeks on 80 mg of iron a day (PMID: 18054688). The placebo group had only 5 children.

Iron makes sense when a blood test shows you’re low. Ferritin is usually the first thing I check.

Zinc

A 2021 review of 6 trials in 489 children found that zinc improved total ADHD symptom scores (PMID: 34184967).

In one US trial of 52 children, those taking 30 mg of zinc a day needed a 37% lower amphetamine dose for the best effect (PMID: 21309695). If you take an amphetamine and start zinc, let your prescriber know.

Vitamin D

Four trials added vitamin D to methylphenidate in 256 children and found a small improvement in symptoms (PMID: 31368773). In a 2026 study of adults, lower vitamin D levels went along with more hyperactivity and impulsivity (PMID: 41741629).

Vitamin D is easy to test. If your level is low, replacing it is reasonable on its own merits.

Vitamin B12

The same 2026 study found lower B12 levels in 35 adults with ADHD than in 36 adults without it, and lower B12 tracked with more inattention (PMID: 41741629). B12 hasn’t been tested as an ADHD treatment.

B12 is worth checking if you’re vegan or vegetarian, or if you take metformin or an acid reducer, since all of these can lower it (NIH Office of Dietary Supplements).

L-Methylfolate

L-methylfolate is the active form of folate. In 44 adults taking methylphenidate, adding 15 mg of L-methylfolate for 12 weeks didn’t improve ADHD symptoms more than placebo (PMID: 30566416).

Magnesium and Magnesium L-Threonate

Magnesium has been studied for ADHD alongside vitamin D. In 66 children, 8 weeks of the combination improved conduct, social, and emotional scores (PMID: 33865361). In 40 children given magnesium with vitamin B6, symptoms improved during treatment and returned after it stopped (PMID: 16846100).

Magnesium L-threonate is a form that raised brain magnesium levels in rats (PMID: 20152124). In an open pilot of 15 adults with ADHD, 47% responded over 12 weeks (PMID: 32162987). That study had no placebo group.

Supplemental magnesium tops out at 350 mg a day for adults, mainly because more can cause diarrhea. It can also interact with some antibiotics and osteoporosis drugs (NIH Office of Dietary Supplements).

Broad-Spectrum Vitamin-Mineral Formulas

This category has the best adult data. In 80 adults with ADHD, an 8-week vitamin-and-mineral formula improved self-rated and observer-rated symptoms, and clinicians rated the treated group as more improved overall (PMID: 24482441). On the clinician-rated ADHD scale, it did no better than placebo.

At one year, people who stayed on the formula kept their gains, and cost was the main reason people stopped (PMID: 24804687). In 126 children, 54% responded on the formula compared with 18% on placebo (PMID: 34303786).

Thiamine, Riboflavin, and Biotin

Thiamine (B1), riboflavin (B2), and biotin haven’t been tested as ADHD treatments. High-dose biotin can change some thyroid test results (PMID: 28973622).

Omega-3 for ADHD

Omega-3 fish oil is the most studied supplement for ADHD. An early review of 10 trials found a small benefit, larger with higher doses of EPA (PMID: 21961774). A 2023 Cochrane review of 37 trials found no difference from placebo on parent-rated ADHD symptoms (PMID: 37058600).

In a 12-week trial of 92 young people, 1.2 g of EPA a day improved attention and vigilance in those who started with low EPA levels (PMID: 31745072). There’s no adult ADHD trial of omega-3 yet.

In heart-disease prevention trials with an average age of 65, omega-3 supplements were linked to a higher risk of atrial fibrillation (PMID: 34612056). The risk was higher above 1 g a day.

Saffron for ADHD

In a 6-week trial of 54 children and teens, parent and teacher ratings improved on both saffron and methylphenidate (Ritalin) (PMID: 30741567). The two groups didn’t differ significantly, and side effects were about as common in each.

Adults have one trial so far, a randomized, placebo-controlled study of saffron added to standard ADHD treatment (Pazoki 2022).

A 2023 systematic review of 4 studies with 118 patients found benefit from saffron both added to methylphenidate and on its own, with no significant safety problems (PMID: 37864351). The studies are still small, and the comparison with methylphenidate had no placebo group.

The children’s trial used 20 to 30 mg of saffron a day for 6 weeks.

A 2025 review estimated that 20 to 30% of commercial saffron is mixed with other plants or with dyes (PMID: 40792566). Look for a brand that states how much saffron each capsule contains.

Saffron hasn’t been studied alongside SSRIs or amphetamines such as Adderall. If you take either, check with your prescriber before adding saffron.

Caffeine, L-Theanine, and Amino Acids

Caffeine

Many adults with ADHD use coffee to focus. In a review of 7 trials with 104 children, caffeine did no better than placebo on ADHD symptoms (PMID: 37759905). The review didn’t include any adult trials.

If you take a stimulant, mention your caffeine intake to your prescriber. Newer caffeine relatives sold in focus products, paraxanthine and theacrine, have been tested only in small groups of healthy adults (PMID: 34836235; PMID: 41950524).

L-Theanine

L-theanine is an amino acid from tea. In 98 boys with ADHD, 400 mg a day for 6 weeks improved sleep quality, though it didn’t help them fall asleep faster (PMID: 22214254).

In 21 young people aged 10 to 19 with ADHD, a single dose of L-theanine with caffeine reduced false alarms on an attention task (PMID: 42096377).

L-Tyrosine and Phenylalanine

L-tyrosine is a building block of dopamine. In an open study of 12 adults with ADHD, 8 improved within 2 weeks, and the effect faded by week 6 (PMID: 3300376).

In a 2-week crossover trial of DL-phenylalanine, 13 of 19 adults finished, mood improved, and the benefit faded within 3 months (PMID: 3903813). People with phenylketonuria (PKU) need to avoid phenylalanine.

Supplements for Sleep: Melatonin, Glycine, and Calming Herbs

A navy cup of chamomile tea with steam carrying chamomile flowers and lemon balm leaves, illustrating supplements for ADHD that support sleep

Melatonin

Many adults with ADHD have a body clock that runs late (PMID: 20163790). In 51 adults with ADHD and delayed sleep, 3 weeks of 0.5 mg melatonin timed to each person’s body clock shifted it about 1.5 hours earlier and lowered ADHD symptoms by 14% (PMID: 33121289). Symptoms returned to baseline 2 weeks after people stopped.

In children already taking a stimulant, 5 mg of melatonin helped them fall asleep 16 minutes sooner than placebo (PMID: 16670647). The antidepressant fluvoxamine raised melatonin levels 17-fold in healthy volunteers, so check with your prescriber if you take it (PMID: 10668847).

For a fuller look at sleep aids, see my psychiatrist’s guide to sleep medications, peptides, and supplements.

Glycine

Glycine is an amino acid often taken at 3 g before bed. In healthy adults with restricted sleep, 3 g of glycine reduced daytime fatigue compared with placebo (PMID: 22529837). There’s no ADHD research on it.

Lemon Balm and Chamomile

A 2022 review of 7 trials in children and teens found fair evidence for lemon balm, chamomile, bacopa, and valerian for ADHD symptoms (PMID: 35592415).

Chamomile has adult data for anxiety. In 57 adults with generalized anxiety disorder, 8 weeks of chamomile extract lowered anxiety scores more than placebo (PMID: 19593179). Chamomile is in the daisy family, so people with that allergy should be careful.

Blue-Light-Blocking Glasses

Amber glasses block the blue light that delays the body clock in the evening. In a small open study of adults with ADHD and insomnia, wearing them in the evening improved sleep quality scores (Fargason 2013).

The glasses are meant to shift sleep timing earlier. A controlled trial on ADHD symptoms hasn’t been done.

Grounding

Grounding means sleeping on a conductive pad connected to the earth. In a 12-person study without a control group, nighttime cortisol was lower by week 6, and people reported better sleep over the 8 weeks (PMID: 15650465).

Herbs and Mushrooms for ADHD

Ginkgo

In a 6-week trial in children, adding ginkgo to methylphenidate improved parent-rated inattention more than adding a placebo (PMID: 25925875). Taken on its own in another trial of 50 children, ginkgo was less effective than methylphenidate (PMID: 19815048).

If you take a blood thinner or an SSRI, check with your prescriber before starting ginkgo.

Bacopa

Bacopa has the best memory data of the herbs here. A review of 9 trials in adults found that it improved processing speed and reaction time (PMID: 24252493).

In 112 boys with inattention and hyperactivity, 14 weeks of bacopa improved a test of cognitive flexibility, with no difference in behavior ratings (PMID: 35041248). Stomach-related side effects were reported in a trial in older adults (PMID: 20590480).

Rhodiola

Rhodiola is used for fatigue and stress. In 60 adults with burnout, 576 mg a day for 28 days improved scores on an attention test compared with placebo (PMID: 19016404).

Rhodiola extracts block MAO enzymes in lab tests (PMID: 19168123). If you take an antidepressant, check with your prescriber first.

Korean Red Ginseng

In 70 children and teens with inattention and hyperactivity, 2 g a day of Korean red ginseng extract for 8 weeks improved inattention scores more than placebo (PMID: 25369174).

Cordyceps

Cordyceps is a fungus popular for energy and endurance, and it hasn’t been studied for ADHD. Products are made from either the fruiting body or the mycelium.

Cordycepin, the compound most often studied, was found in a Cordyceps militaris fruiting-body product but not in fermented mycelium products from other species (PMID: 31002629). Within Cordyceps militaris, a pure-culture mycelium measured 0.182% cordycepin and the fruiting body 0.11% (PMID: 26559699).

In a 2026 survey of 65 cordyceps products sold online in Thailand, 54% didn’t match the species or form on the label, and 6% contained steroids (PMID: 41947147).

Catuaba and Oroxylin A

Both have been studied in animals. In rat brain tissue, catuaba extract blocked the reuptake of dopamine and serotonin and increased dopamine release (PMID: 15991001).

In rats bred as a model of ADHD, oroxylin A improved attention and impulsivity, and in lab tests it blocked dopamine reuptake, the same mechanism methylphenidate uses (PMID: 23371806). An extract of Oroxylum indicum, the plant oroxylin A comes from, improved some memory tasks over 12 weeks in 82 older adults with memory complaints (PMID: 34531736).

Neither has been tested in people with ADHD or alongside a stimulant. Since both act on dopamine, check with your prescriber before combining either with a stimulant.

Alpha-GPC and Citicoline

Both are sources of choline, which the brain uses to make acetylcholine. In 75 healthy teenage boys, citicoline for 28 days improved attention (PMID: 26179181).

Alpha-GPC hasn’t been studied for ADHD. A large Korean health-records study linked its use with a higher rate of stroke (PMID: 34817582). Trials haven’t tested that link.

Other Herbs and Supplements

Lion’s mane sped up a reaction-time test after a single dose in 41 healthy adults, with no clear change after 28 days (PMID: 38004235).

Ashwagandha is sold for stress and sleep and hasn’t been studied for ADHD. A case series reported 5 cases of liver injury linked to it (PMID: 31991029).

Taurine has been studied as an energy-drink ingredient, and in that study the attention gains came from the caffeine (PMID: 22819803). Agmatine has been studied for ADHD only in rats (PMID: 34914421).

In 60 children who hadn’t responded to atomoxetine, adding CoQ10 for 6 months improved parent ratings more than adding a placebo (PMID: 34819012).

Deanol (DMAE) was sold as the prescription drug Deaner until FDA withdrew its approval in 1983 for lack of evidence of effectiveness (Federal Register, May 24, 1983).

Products Marketed as “Natural Adderall”

Some products sold online for focus contain drug-like ingredients. Products sold as research chemicals have no quality standards, so their contents and dose can’t be relied on. Even supplements sold for brain health have been found to contain the unapproved drug piracetam (PMID: 31764936).

Mucuna Pruriens

Mucuna pruriens is a bean that naturally contains levodopa, a prescription Parkinson’s drug. Six commercial products tested between 6% and 141% of the levodopa on their labels (PMID: 28922612). It hasn’t been studied for ADHD.

Prescription levodopa can’t be combined with nonselective MAOI antidepressants, and its label warns about hallucinations and impulse-control problems (FDA label, March 2026). Because Mucuna contains levodopa, the same cautions apply.

PEA and Hordenine

PEA (phenethylamine) and hordenine appear in focus and pre-workout products. The body breaks PEA down quickly through the enzyme MAO-B (PMID: 11281991), so people taking an MAOI such as selegiline should avoid it.

Testing of sports and weight-loss supplements has found up to four prohibited stimulants in a single product (PMID: 33755516). FDA has issued warning letters about one such stimulant, DMHA (FDA, March 2023).

Bromantane

Bromantane is a drug developed in Russia for fatigue. In rat studies, it switched on the genes for two enzymes that make dopamine, tyrosine hydroxylase and DOPA decarboxylase. Dopamine levels in the brain rose along with them (PMID: 15500036; PMID: 17854844).

It isn’t approved in the US, and the World Anti-Doping Agency lists it as a banned stimulant (WADA 2026 Prohibited List). It hasn’t been studied in people with ADHD. I cover its mechanism in more detail in my article on ADHD neuroscience and emerging research.

Phenylpiracetam and Other Racetams

Phenylpiracetam is a drug developed in Russia. In 2019, FDA told a US seller that phenylpiracetam, piracetam, and Noopept aren’t dietary supplements (FDA warning letter, February 2019). None has been studied for ADHD, and phenylpiracetam is on the WADA banned list as 4-phenylpiracetam.

Vinpocetine

Vinpocetine is sold for memory. FDA warns that it may cause miscarriage and shouldn’t be used by anyone who is or could become pregnant (FDA, February 2023).

Istradefylline

Istradefylline (Nourianz) is an FDA-approved prescription drug for Parkinson’s disease (FDA approval letter, August 2019). It blocks adenosine A2A receptors, one of the receptors caffeine also blocks. It hasn’t been studied in people with ADHD, and its label lists hallucinations and impulse-control problems among its side effects (FDA label).

Modafinil

Modafinil is a prescription wakefulness drug. In the largest adult ADHD trial of modafinil, 338 adults took it or placebo for 9 weeks, and no dose did better than placebo (PMID: 22617860).

Peptides

Semax and Selank are peptides developed in Russia. Semax hasn’t been studied for ADHD, and in rodent studies it increased amphetamine’s effect on dopamine (PMID: 15188751).

Peptide therapy is offered when legally available, which it isn’t yet. I cover the details in my guide to peptides with psychiatric medications and my article on whether Semax is legal.

Nicotine, Cannabis, and Microdosing

Nicotine

Nicotine affects attention. In 17 adults with ADHD, a nicotine patch improved attention-test reaction times and clinician ratings over a few hours (PMID: 8741955). In 52 adults, it lowered self-rated symptoms by 8% over 2 days (PMID: 20025370).

Adults with ADHD smoke more often and find it harder to quit. In one study, men with ADHD had a quit rate of 23%, compared with 52% in the general population (PMID: 8749796). Children with ADHD are more likely to develop nicotine dependence later (PMID: 21382538).

Nicotine is addictive, and it isn’t a recommended treatment for ADHD.

Cannabis and CBD

The only adult ADHD trial of a cannabis medicine gave a THC and CBD spray to 30 adults, and the main attention measure didn’t change significantly (PMID: 28576350). No trial has tested CBD alone for ADHD.

CBD raises the levels of some medications, including the seizure drug clobazam (FDA Epidiolex label, June 2025). If you use CBD, tell whoever prescribes your other medications.

Psychedelic Microdosing

Microdosing means taking a very small dose of a psychedelic on a schedule. In a 2025 trial, 53 adults with ADHD took 20 micrograms of LSD or a placebo twice a week for 6 weeks, and both groups improved by about the same amount (PMID: 40105807). Two placebo-controlled trials of psilocybin microdosing also found no difference from placebo (PMID: 41110634).

LSD and psilocybin are Schedule I drugs under federal law (21 CFR 1308.11). Lithium and psychedelics shouldn’t be combined. In online reports from people who used both, 47% described seizures (PMID: 34348413).

Before You Start: Labs and Interactions

Before you try supplements for ADHD, a few blood tests can show whether there’s something to correct. I check ferritin, thyroid function (TSH), vitamin D, and, for people at risk, B12.

Biotin, common in hair, skin, and nail products, can throw off some lab tests.

In healthy adults taking 10 mg a day for a week, biotin changed the results of 9 of 23 tests that rely on biotin-based methods. It can also make thyroid results look like an overactive thyroid (PMID: 28973622). If you take biotin, tell whoever orders your blood work.

Some combinations are worth avoiding or reviewing with your prescriber:

St John’s wort shouldn’t be combined with SSRIs, since the combination has caused serotonin syndrome (PMID: 15260917). It also lowers blood levels of many other medications. In a trial of 54 children, it didn’t improve ADHD symptoms (PMID: 18544723).
Fluvoxamine raises melatonin levels sharply (PMID: 10668847).
Mucuna, PEA, and hordenine shouldn’t be combined with MAOI antidepressants.
CBD can raise levels of other medications.
If you take a blood thinner or an SSRI, ask before starting ginkgo.
If you take a stimulant, mention any caffeine, saffron, catuaba, or oroxylin A.

If you’d like an adult ADHD evaluation or a review of the medications and supplements you take now, book a free 15-minute consultation. I see adults across North Carolina by telehealth.

Supplements for ADHD: Frequently Asked Questions

What supplements actually help ADHD?

In adults, the best trial evidence is for a broad vitamin-and-mineral formula, which improved self-rated symptoms in an 80-person trial. Low iron is common in adults with ADHD and worth correcting. Melatonin may help adults whose sleep runs late.

What vitamins help ADHD in adults?

A combined vitamin-and-mineral formula has the best adult trial data. Vitamin D and B12 are worth testing, since lower levels went along with more ADHD symptoms in a 2026 adult study. Iron may help when ferritin is low.

Is saffron comparable to Adderall?

Saffron hasn’t been compared with Adderall. In a 6-week trial of 54 children and teens, ratings improved on both saffron and methylphenidate (Ritalin), and the two groups didn’t differ significantly. In adults, saffron has been studied as an add-on to standard treatment.

How long does saffron take to work?

The children’s trial measured results at 3 and 6 weeks, using 20 to 30 mg a day.

Can I treat my ADHD naturally?

Supplements and better sleep may help alongside other treatment. Correcting low iron, vitamin D, or B12 and fixing a late sleep schedule are good places to start. An evaluation can show which approach fits you.

What is the strongest herb for ADHD?

Several herbs have children’s trials. Korean red ginseng improved inattention in 70 children, bacopa improved cognitive flexibility in 112 boys, and ginkgo improved inattention when added to methylphenidate. Saffron, a spice, has the most recent research, including one adult trial.

Is there a natural alternative to Adderall?

Stimulants have the strongest evidence for ADHD, and no supplement acts the same way. If you’d like to avoid stimulants, there are FDA-approved non-stimulant prescriptions, including atomoxetine and viloxazine, and bupropion is sometimes used off-label. Supplements may help alongside these.

Is fish oil worth taking for ADHD?

It may help most if your omega-3 levels are low. In a 12-week trial, EPA improved attention in young people who started with low levels, while the largest review found no average benefit on parent ratings.

Get a Comprehensive ADHD Evaluation in North Carolina

Book a free 15-minute consultation to talk through your symptoms, the supplements and medications you take now, and your options.

Schedule Free Consultation

Baghel Psychiatry, PLLC | Shantanu Baghel, DO | (910) 612-6015 | sbaghel@thebh.us

Disclaimer: This article is for educational purposes and isn’t medical advice. Supplements aren’t FDA-approved to treat ADHD, and they can interact with prescription medications. Talk with your prescriber before starting or stopping any supplement. If you’re in crisis, call or text 988.

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