Supplements
magnesium prevents migraine
In plain terms: Can magnesium help prevent migraines?
Part of: 🧪 magnesium
Reasonably yes—multiple trials support oral magnesium for migraine prophylaxis, with a modest but consistent effect.
📅 Last reviewed: 2026-07-15 ⓘ
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
How the studies fall
What the evidence shows
Magnesium is a plausible, guideline-mentioned migraine prophylactic, and the oral-prophylaxis trial base is now reasonably consistent: multiple RCTs (Mg citrate 600 mg, MgO 500 mg comparable to sodium valproate, Mg + L-carnitine) reduced attack frequency/severity, alongside a 2025 dose-response meta-analysis.
The evidence (12)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Chiu HY, Yeh TH, Huang YC, Chen PY 2016 · Pain Physician | meta-analysis | mixed | moderate | MA of IV and oral Mg for migraine: equivocal findings across acute vs preventive settings. |
| Taubert K 1994 · Fortschritte der Medizin | observational | supports | low | Multicenter pilot: Mg associated with positive influence on migraine attack incidence (pilot-grade). |
| Khani S, Hejazi SA, Yaghoubi M, Sharifipour E 2021 · J Headache Pain | RCT | supports | low | RCT: magnesium effective for migraine prophylaxis, comparable to sodium valproate. |
| Köseoglu E, Talaslioglu A, Gönül AS, Kula M 2008 · Magnes Res | RCT | supports | moderate | Double-blind RCT (migraine without aura): Mg citrate 600 mg reduced attack frequency and severity vs placebo. |
| Orr SL, Venkateswaran S 2014 · Cephalalgia | observational | mixed | low | Pediatric nutraceutical review: Mg among options but evidence limited in children. |
| Tarighat Esfanjani A, Mahdavi R, Ebrahimi Mameghani M, Talebi M, Nikniaz Z, Safaiyan A 2012 · Biol Trace Elem Res | RCT | supports | moderate | RCT (n=133): MgO 500 mg significantly reduced migraine frequency, days and severity vs control. |
| Talandashti MK, Shahinfar H, Delgarm P, Jazayeri S 2025 · Neurol Sci | meta-analysis | supports | moderate | SR + dose-response MA of dietary supplements for migraine prophylaxis: magnesium among supplements showing a preventive dose-response signal. |
| Okoli GN, Rabbani R, Kashani HH, Wierzbowski AK, Neilson C, Mansouri B, Zarychanski R, Abou-Setta AM 2019 · Can J Neurol Sci | meta-analysis | tested-null | low | Okoli 2019 SR/MA (magnesium pooled 3 trials, 226 adults): magnesium 'did not significantly decrease migraine severity (RoM -0.17 (-0.36 to 0.02); I2 48%; 3 trials; 226 participants; low strength of the evidence)'. Only severity was poolable - attack frequency (the scoped outcome) was not meta-analysed. Interval includes no effect, point estimate favours Mg: null on a directional claim = contradicts, quality low per the authors' grading. Underpowered trend toward the claim (point estimate favours it, interval includes no effect): graded tested-null per CONVENTIONS §5 second clarification 2026-09-26. |
| Evers S 2008 · Nervenarzt | observational | mixed | low | Migraine-prevention review: Mg listed as a second-choice preventive (lower/less-published efficacy). |
| Karimi N, Razian A, Heidari M 2021 · Acta Neurol Belg | RCT | supports | moderate | Double-blind crossover RCT: MgO 500 mg reduced attacks similarly to valproate, no significant adverse effects. |
| Wu J, Wu J, Zhang J, Liu B, Song X, Wu Y, Tian F, Ding Y, Wang P 2025 · Frontiers in pharmacology | meta-analysis | mixed | moderate | Network MA, 44 trials/4612pts oral prophylaxis; Mg not a standalone monotherapy arm, only 'valproate+magnesium' combo noted |
| Karatoprak EY, Ozkan CM, Tural MS, Sahin SS 2025 · Northern clinics of Istanbul | observational | supports | low | Retrospective peds, MgO 6-9mg/kg/d or 365mg/d x4mo; freq/PedMIDAS/HIT-6 all improved p<0.001, but NO control/placebo arm |
Disagree, or know a study we missed?
We grade by evidence, not opinions. The way to weigh in is to point us to a study we haven't cited (check the evidence table above first), or to flag a problem with one we have. Every submission is reviewed; if it holds up, the grade updates and shows in Science Changes Its Mind.
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.