Magnesium for Migraines

• July 19 2024, by SANUSq Research team
• 9 min reading time

Anyone who suffers migraines knows they're far more than "just a headache" — so could a humble mineral like magnesium really help keep them at bay?

Written by SANUSq Research Team | Medically reviewed by Dr Ajay Kumar, MD
Published: 30 June 2024 | Updated: 24 August 2026

More than a headache

People who suffer from migraines know that a migraine is much more than an ordinary headache. That intense, often throbbing pain — on one or both sides of the head — can be genuinely incapacitating, and it frequently comes with nausea, vomiting, and a distressing sensitivity to light and sound. Some people experience an "aura" of visual disturbances beforehand. Migraine is a real neurological condition, not a sign of weakness or simply "stress", and for the millions who live with it, effective prevention can be life-changing. This is where magnesium enters the picture. Of the non-drug options people try for migraine, it is one of the better studied, and it belongs firmly to prevention rather than rescue.

Why magnesium is relevant

Magnesium is an essential mineral involved in more than 300 biochemical reactions in the body, including those that govern nerve signalling, muscle function and blood vessel tone — all of which are relevant to what happens during a migraine. Intriguingly, research has repeatedly found that many people who suffer migraines tend to have lower magnesium levels, and magnesium is thought to influence several mechanisms involved in migraine, from nerve excitability to the constriction and dilation of blood vessels and the release of certain neurotransmitters. This biological plausibility is backed by clinical evidence.

It's worth understanding just how central magnesium is to normal nerve and muscle function, because that's the thread connecting it to migraine. Magnesium helps regulate the flow of calcium into nerve cells and dampens excessive nerve excitability; it supports the relaxation of blood vessels and muscles; and it's involved in the systems that manage pain signalling and the release of neurotransmitters like serotonin. Each of these is implicated in migraine, a condition increasingly understood as one of abnormal brain excitability rather than simply "blood vessels". A relative shortage of magnesium could therefore tip the balance towards the kind of nerve hyper-excitability that helps trigger an attack — which is exactly the rationale for topping it up.

What the evidence supports

The research picture is encouraging while remaining honest about magnesium's place.

The key word is prevention: magnesium is taken regularly to reduce the frequency and severity of attacks over time, rather than as an instant painkiller for an attack in progress. Its effects are generally modest, and it appears to help most in people who are magnesium-deficient and those who experience migraine with aura. But given that it's inexpensive, widely available and very well tolerated, it's a reasonable, low-risk option to consider as part of a migraine-prevention strategy — ideally alongside, not instead of, medical advice.

Migraine relief: natural steps and the bigger picture

Magnesium works best when it's one strand of a broader migraine-management approach rather than a lone solution, because migraine is influenced by many factors. A big part of living well with migraine is identifying and managing your personal triggers, which vary from person to person but commonly include stress (and, interestingly, the "let-down" period after stress), poor or irregular sleep, skipped meals and dehydration, certain foods and drinks, alcohol, hormonal changes, and bright lights or strong smells. Keeping a simple headache diary — noting when attacks happen and what preceded them — can reveal patterns you can then act on. Alongside this, the everyday foundations genuinely help: regular sleep and meal times, staying hydrated, regular gentle exercise, and managing stress, since a calmer nervous system is less prone to attacks. Magnesium fits naturally into this picture, both because it may directly support migraine prevention and because it's involved in the stress response and muscle relaxation. The point is that no single measure is usually a complete answer; the people who manage migraine best tend to combine sensible lifestyle habits, trigger awareness, an appropriate preventive approach like magnesium where suitable, and medical care when needed — a layered strategy rather than a search for one magic fix. That is the honest framing: for most people, relief comes in layers rather than from a single lever.

Using magnesium sensibly

If you want to try magnesium for migraines, a few practical points help. The form matters: well-absorbed forms such as magnesium citrate or glycinate are generally preferred over magnesium oxide, which is poorly absorbed and more likely to cause loose stools (the main side effect at higher doses). Consistency matters too, since this is a preventive approach that needs to be taken regularly for a couple of months to judge whether it helps. You can also boost magnesium through diet — leafy greens, nuts, seeds, legumes, whole grains and dark chocolate are all good sources. Our Liposomal Magnesium OptiNerve offers a well-absorbed option. Crucially, though, magnesium should complement proper medical care, not replace it. Migraine is a medical condition that benefits from a doctor's assessment — especially if your headaches are frequent, severe, or changing in pattern — and some people need prescription preventive medication. Seek urgent medical attention for any sudden, severe "worst-ever" headache, or a headache with new neurological symptoms, as these need immediate evaluation. We cover related ground in herbs for stress and anxiety, since stress is a common migraine trigger.

Frequently asked questions

Can magnesium help with migraines?

Yes — oral magnesium has Level B evidence (probably effective) for preventing episodic migraine per neurology guidelines, and several trials support it for headache prevention. It's taken regularly to reduce the frequency and severity of attacks, and appears to help most in people who are magnesium-deficient or have aura.

How does magnesium prevent migraines?

Magnesium is involved in nerve signalling, muscle function and blood vessel tone, all relevant to migraine. Many migraine sufferers have lower magnesium levels, and it's thought to influence nerve excitability, blood vessel behaviour and neurotransmitter release — mechanisms central to how migraines develop.

Which magnesium is best for migraines?

Well-absorbed forms such as magnesium citrate or glycinate are generally preferred over magnesium oxide, which is poorly absorbed and more likely to cause loose stools. Because it's a preventive approach, take it consistently for a couple of months to judge whether it helps you.

Does magnesium stop a migraine attack?

Magnesium is mainly a preventive measure, taken regularly to reduce how often and how severely attacks occur — not an instant painkiller for an attack in progress. Its effects build over time. For acute attacks, follow the treatment your doctor recommends.

Are there side effects to taking magnesium?

Magnesium is generally very well tolerated. The main side effect is loose stools or digestive upset at higher doses, especially with poorly absorbed forms like magnesium oxide. People with kidney problems should check with a doctor first, as they may need to limit magnesium.

When should I see a doctor about migraines?

See your doctor if headaches are frequent, severe, or changing in pattern, as you may benefit from preventive medication. Seek urgent care for any sudden "worst-ever" headache or one with new neurological symptoms. Magnesium should complement medical care, not replace it.

References

1. Khani S, Hejazi SA, Yaghoubi M, et al. Comparative study of magnesium, sodium valproate, and concurrent magnesium-sodium valproate therapy in the prevention of migraine headaches: a randomized controlled double-blind trial. J Headache Pain. 2021;22(1):21. PMC8028183
2. Maier JA, Pickering G, Giacomoni E, et al. Headaches and Magnesium: Mechanisms, Bioavailability, Therapeutic Efficacy and Potential Advantage of Magnesium Pidolate. Nutrients. 2020;12(9):2660. PMC7551876

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Brain & Cognition Magnesium Pain & Joints Stress & Anxiety

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