Magnesium And Migraines — The Evidence

Magnesium and Migraines: What the Research Actually Shows

If you suffer from migraines, you’ve probably been told at some point to “try magnesium.” Maybe you nodded politely and moved on, assuming it was the kind of vague, well-meaning advice that doesn’t really go anywhere. But what if there’s more to it than a passing suggestion? What if the relationship between magnesium and migraines is one of the more genuinely well-supported stories in nutritional neuroscience, and most people just don’t know it yet?

Vitacuity has reviewed over 1.77 million research papers and selected the most relevant studies on this topic. What we found is a body of evidence that is, frankly, more compelling than the “just try magnesium” conversation usually suggests. This isn’t a miracle cure story. But it is a story worth understanding properly.

The Science Behind Magnesium and Migraines

To understand why magnesium matters for migraines, you first need a quick mental model of what a migraine actually is, and it’s a lot more than a bad headache.

Migraine is classified as a complex neurological condition. It’s among the top ten causes of disability globally, the leading cause of disability in children and adolescents aged 5 to 19, and the second leading cause in adults aged 20 to 59 [1]. That’s not a headache problem. That’s a brain problem.

One of the key mechanisms researchers have focused on is something called cortical spreading depression, essentially a wave of electrical activity that sweeps across the brain’s cortex and is thought to trigger migraine attacks. Magnesium appears to play a direct role in suppressing this wave. It also influences several other processes that matter in migraine pathogenesis: vascular tone (how blood vessels in the brain contract and dilate), oxidative stress, chronic inflammation, neurotransmitter release, and the regulation of neuronal excitability [1].

Think of magnesium as a kind of molecular stabiliser in the brain. When levels are adequate, neurons fire in an orderly, controlled way. When magnesium is low, the system becomes hyperexcitable, thresholds drop, and the brain becomes more vulnerable to triggering a migraine attack [8].

This isn’t a theoretical link. Multiple studies have measured lower magnesium levels in people with migraines compared to those without, and found that those levels drop even further during an actual attack [9]. One study of 80 subjects found that serum magnesium in migraine patients was significantly lower than in healthy controls (1.79 ± 0.14 mg/dL versus 2.10 ± 0.17 mg/dL, p < 0.0001), and that this lower magnesium level correlated directly with markers of neuronal hyperexcitability in the visual pathways [8].

There’s also an energy metabolism angle. Magnesium is involved in mitochondrial function, the process by which brain cells generate energy. Several researchers have proposed that migraine-prone brains may have an underlying energy deficit, and that this deficit lowers the threshold for attacks [14]. Magnesium, alongside CoQ10 and riboflavin, sits at the heart of this metabolic story.

Lower Magnesium Levels Are Consistently Found in People With Migraines

Before asking whether supplementation helps, it’s worth asking: is there actually a deficiency problem here?

The evidence suggests yes, and it’s not trivial.

A 2023 cross-sectional study of 67 women found that those with migraines had significantly lower plasma levels of magnesium compared to controls, and that their dietary intake of magnesium was also significantly lower [12]. This wasn’t just a during-attack phenomenon, these were interictal measurements, taken during pain-free periods. The magnesium deficit appears to be a background state, not just a consequence of the migraine itself.

A separate 2023 study of 80 subjects, 40 diagnosed migraineurs and 40 healthy controls, found the same pattern: serum magnesium was meaningfully lower in the migraine group at rest, and this correlated with elevated visual evoked potential amplitudes, a marker of neuronal hyperexcitability [8]. Lower magnesium, more excitable brain.

In children, a 2022 cross-sectional study found that among adolescents specifically, serum magnesium was significantly lower in those with migraines compared to those without (p < 0.045), though the overall paediatric sample of 35 per group didn't show significance, suggesting the relationship may strengthen with age and hormonal change [13].

The picture that emerges: magnesium deficiency isn’t just a possible risk factor for migraines. It appears to be a consistent feature of the migraine-prone brain, measurable even between attacks.

Magnesium Supplementation Reduces Attack Frequency, Severity and Migraine Days

Here’s where the research moves from observation to intervention, and where things get genuinely interesting.

A 2025 systematic review and dose-response meta-analysis of randomised controlled trials examined the effect of multiple dietary supplements on migraine outcomes [2]. The magnesium findings were among the strongest in the analysis. Compared to placebo, magnesium supplementation produced:

– A mean reduction in migraine attacks of -2.51 attacks – A mean reduction in severity of -0.88 points – A mean reduction in monthly migraine days of -1.66 days

These are clinically meaningful numbers for people whose lives are significantly disrupted by migraines. This isn’t a marginal statistical effect, a reduction of roughly 2.5 attacks per month, if replicated in practice, represents a genuine shift in quality of life.

A 2025 comprehensive review in the journal *Nutrients* reinforced this picture, noting that accumulated evidence from case reports, case-control studies, observational studies, and randomised placebo-controlled trials consistently supports magnesium supplementation both for acute migraine management and for chronic prevention [1].

A clinical review published in 2025 looking at nutraceuticals and headache concluded that magnesium is formally recommended for migraine prevention, with the most commonly noted side effects being mild gastrointestinal symptoms, making it one of the better-tolerated preventive options available [5].

Evidence grade: Strong for migraine prevention, multiple RCTs, consistent findings across meta-analyses.

The Hormonal Connection: Why It May Matter More for Women Before Menopause

One of the more nuanced and clinically interesting findings to emerge recently concerns the interaction between magnesium, migraines, and hormonal status.

A 2025 cross-sectional study analysed data from 3,248 women from the US National Health and Nutrition Examination Survey [4]. It compared pre-menopausal women (n=1,412) with post-menopausal women (n=1,836) and looked at how magnesium intake related to migraine prevalence in each group.

The findings were striking. Migraine prevalence was markedly higher in pre-menopausal women (31.3%) than post-menopausal women (15.6%). And in pre-menopausal women, there was a significant non-linear relationship: every unit increase in magnesium intake below a threshold of 325.41 mg/day was associated with a 36% reduction in migraine odds (OR: 0.64, 95% CI: 0.42–0.98). Above that threshold, the association disappeared. In post-menopausal women, no significant association was found at all [4].

What this suggests is that magnesium’s protective effect may be particularly important during reproductive years, perhaps because oestrogen influences magnesium regulation, and hormonal fluctuations across the menstrual cycle may lower magnesium levels in ways that increase migraine vulnerability. This is an important nuance: magnesium supplementation isn’t a one-size-fits-all story, and women in their 30s and 40s with hormonal migraines may have the most to gain.

Evidence grade: Promising, large observational sample, but cross-sectional design means we can’t confirm causation.

Magnesium in Pregnancy: A Safer Option When Choices Are Limited

For pregnant women with migraines, the therapeutic toolkit is severely restricted. Many standard migraine medications are contraindicated during pregnancy, which leaves patients with very few evidence-based options.

A 2023 retrospective cohort study of 203 pregnant patients treated for migraines between 2015 and 2020 examined the effects of magnesium oxide (MgO) alone (117 patients) and MgO combined with riboflavin (86 patients) [15]. Both groups showed statistically significant reductions in migraine frequency, severity, and duration (p < 0.01 for all outcomes). Of 154 patients who reported associated symptoms such as photophobia, phonophobia, nausea and vomiting, 77% improved after treatment.

This is a retrospective study, not a randomised trial, so the findings need to be interpreted with appropriate caution. But for pregnant women who have very limited options, this data provides meaningful real-world support for magnesium oxide as a preventive strategy, particularly when combined with riboflavin.

Evidence grade: Promising, retrospective design limits causal conclusions, but clinically relevant for a population with few alternatives.

Magnesium as Part of a Broader Nutraceutical Stack

It’s worth noting that magnesium rarely appears in isolation in the migraine prevention literature. Several studies look at combination approaches, and the results are consistently favourable.

A 2020 open-label pilot study of 113 Greek patients with episodic migraine tested a fixed combination supplement containing magnesium, vitamin B2 (riboflavin), feverfew, andrographis paniculata, and CoQ10 [10]. After three months, mean monthly migraine days fell from 9.4 (±3.7) to 6.1 (±3.5), a reduction of approximately 3.3 days per month. The supplement was well-tolerated, and a meaningful proportion of participants achieved a 50% or greater reduction in migraine days.

The 2025 meta-analysis [2] also found that CoQ10, riboflavin, and vitamin D each independently reduced migraine frequency, suggesting that the energy metabolism pathway (mitochondrial function) is a genuine therapeutic target, and that magnesium may work synergistically alongside these other nutrients rather than in isolation [6, 14].

This is relevant for anyone considering supplementation: the evidence points toward a complementary stack of nutrients rather than any single magic bullet.

Evidence grade: Promising for combination approaches, open-label pilot design limits conclusions, but consistent with broader RCT evidence for individual components.

What We Don’t Know Yet

Let’s be honest about the gaps, because they matter.

The dosing picture is incomplete. Most trials use magnesium in the range of 300–600mg per day, but the optimal form, dose, and duration haven’t been definitively established. Different forms of magnesium (oxide, citrate, glycinate, sulphate) have different bioavailability profiles, and most studies don’t specify which form is best for migraine prevention. A Cochrane Review on magnesium supplementation for migraine prophylaxis was registered as a protocol in 2025 [3], meaning the gold-standard systematic review hasn’t been fully completed yet. That’s a meaningful gap.

Serum levels don’t tell the whole story. Standard blood tests measure serum magnesium, but this represents only about 1% of total body magnesium. Most of it is intracellular. This means someone can have “normal” serum magnesium while still being functionally deficient at the cellular level, which is precisely why one study used an electrophysiological tetany test rather than serum measurements to detect latent magnesium deficiency [11]. That same study, however, found no statistically significant correlation between the tetany test results and migraine occurrence or frequency, a reminder that the picture isn’t perfectly clean. Magnesium deficiency and migraine susceptibility are linked, but the mechanism isn’t fully resolved.

The hormonal interaction needs more research. The finding that magnesium matters more for pre-menopausal women than post-menopausal women [4] is important and clinically plausible, but it comes from a cross-sectional study. Prospective data and ideally RCTs stratified by hormonal status are needed to confirm this.

Most combination supplement studies lack placebo controls. The open-label pilot study [10] is promising, but without a placebo group, it’s impossible to separate the genuine supplement effect from the natural improvement that often occurs over time in episodic migraine sufferers.

Children and adolescents need more research. The paediatric data is sparse, with small samples and inconsistent findings across age groups [13]. The evidence base is much stronger for adults.

The Final Takeaway

Here’s what a sensible, well-informed person should actually do with this information.

Magnesium is one of the most evidence-supported nutritional interventions for migraine prevention we have. It’s not a pharmaceutical. It won’t work for everyone. But the combination of plausible mechanism, consistent deficiency findings, and positive RCT data places it firmly in the “worth doing” category, particularly for people who are suffering regularly and looking for safe, low-cost options alongside or before pharmaceutical preventives.

The practical logic is straightforward:

– Magnesium deficiency is genuinely common. Over half of American adults fail to meet recommended magnesium intake [4], and UK data tells a similar story. If you’re a migraine sufferer, the odds are reasonable that your levels aren’t optimal.

– Magnesium is water-soluble in its most common supplemental forms and extremely safe at standard doses. The main side effect reported in trials is mild gastrointestinal upset at higher doses [5]. This is not a supplement that requires specialist supervision for most healthy adults.

– The dose that appears in most research is around 400–600mg per day, though some trials have used lower amounts. Magnesium glycinate or citrate forms tend to be better tolerated digestively than magnesium oxide, though oxide has shown effectiveness in some trials including the pregnancy study [15].

– If you’re a pre-menopausal woman with hormonal migraines, the evidence is particularly relevant to you [4]. Magnesium intake below around 325mg per day appears to be where the protective effect is strongest, meaning that simply meeting your dietary baseline may make a difference.

– Consider the combination angle. The evidence suggests magnesium works well alongside riboflavin (vitamin B2) and CoQ10, all three supporting mitochondrial energy metabolism in the brain [6, 14]. If you’re going to invest in migraine prevention nutritionally, these three together make more sense than any one alone.

– Don’t wait for testing before you start. Standard serum magnesium tests don’t capture intracellular levels accurately [11], so a normal result doesn’t rule out functional deficiency. Given the safety profile and the cost of deficiency, supplementing is the practical default here.

And a sensible caveat: if your migraines are severe, frequent, or significantly impacting your life, please work with a doctor or neurologist. Magnesium is a useful tool in the toolkit, not a replacement for proper medical assessment.

But if you’ve been putting off trying magnesium because it felt like vague wellness advice? The research says it’s worth giving it a proper, consistent try.

References

[1] Magnesium and Migraine (2025). DOI: 10.3390/nu17040725 | https://pubmed.ncbi.nlm.nih.gov/40005053/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11858643/

[2] Effects of selected dietary supplements on migraine prophylaxis: A systematic review and dose-response meta-analysis of randomized controlled trials (2025). DOI: 10.1007/s10072-024-07794-0 | https://pubmed.ncbi.nlm.nih.gov/39404918/

[3] Magnesium supplementation for migraine prophylaxis (2025). Cochrane Review Protocol. DOI: 10.1002/14651858.CD016307 | https://pubmed.ncbi.nlm.nih.gov/41216917/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12604082/

[4] Association Between Magnesium Intake and Migraine Among Pre and Postmenopausal Women: A Cross-Sectional Study (2025). DOI: 10.2147/IJWH.S536420 | https://pubmed.ncbi.nlm.nih.gov/40904698/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12404255/

[5] Nutraceuticals and Headache 2024: Riboflavin, Coenzyme Q10, Feverfew, Magnesium, Melatonin, and Butterbur (2025). DOI: 10.1007/s11916-025-01358-3 | https://pubmed.ncbi.nlm.nih.gov/39853578/

[6] Review on Headache Related to Dietary Supplements (2022). DOI: 10.1007/s11916-022-01019-9 | https://pubmed.ncbi.nlm.nih.gov/35254637/

[7] Usefulness of nutraceuticals in migraine prophylaxis (2017). https://pubmed.ncbi.nlm.nih.gov/28527067/

[8] Can Serum Magnesium Level and Visual Evoked Potentials (P100) be a Predictive in Migraineurs?: Evidence Based Study (2023). DOI: 10.4103/0028-3886.378668 | https://pubmed.ncbi.nlm.nih.gov/37322741/

[9] Serum Magnesium Levels During the Ictal and Interictal Phase in Patients of Migraine: A Prospective Observational Study (2022). https://pubmed.ncbi.nlm.nih.gov/36352578/

[10] Open Label Prospective Experience of Supplementation with a Fixed Combination of Magnesium, Vitamin B2, Feverfew, Andrographis Paniculata and Coenzyme Q10 for Episodic Migraine Prophylaxis (2020). DOI: 10.3390/jcm10010067 | https://pubmed.ncbi.nlm.nih.gov/33375459/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7794912/

[11] Migraine and Its Association with Hyperactivity of Cell Membranes in the Course of Latent Magnesium Deficiency, Preliminary Study of the Importance of the Latent Tetany Presence in the Migraine Pathogenesis. DOI: 10.3390/nu13082701 | https://pubmed.ncbi.nlm.nih.gov/34444861/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401654/

[12] Decreased plasma levels and dietary intake of minerals in women with migraine (2023). DOI: 10.1080/1028415X.2022.2075308 | https://pubmed.ncbi.nlm.nih.gov/35656968/

[13] Serum Magnesium Levels in Children With and Without Migraine: A Cross-Sectional Study (2022). https://pubmed.ncbi.nlm.nih.gov/35751375/

[14] Energy Metabolism Impairment in Migraine (2019). https://pubmed.ncbi.nlm.nih.gov/29932030/

[15] Assessing the efficacy of magnesium oxide and riboflavin as preventative treatment of migraines in pregnancy (2023). DOI: 10.1007/s00404-022-06872-y | https://pubmed.ncbi.nlm.nih.gov/36495328/

This article is for informational purposes only and does not constitute medical advice. Food supplements should not be used as a substitute for a varied and balanced diet and healthy lifestyle. If you are pregnant, breastfeeding, taking medication or have a medical condition, consult your doctor before taking any supplement. These statements have not been evaluated by the Food and Drug Administration (FDA) or the Medicines and Healthcare products Regulatory Agency (MHRA). This product is not intended to diagnose, treat, cure, or prevent any disease.