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the claim

Magnesium supplementation lowers blood pressure in adults.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
8 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that magnesium supplementation lowers blood pressure in adults?

Yes. A 2025 meta-analysis of 38 randomized controlled trials reports that magnesium supplementation reduced systolic blood pressure by about 2.8 mm Hg and diastolic by about 2.1 mm Hg versus placebo, with larger reductions in hypertensive and hypomagnesemic subgroups. Smaller trials in hypertensive patients and a Korean observational study point the same way, though effects are modest and not significant in normotensive adults.

Verdict: SUPPORTED · 8 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 8
Magnesium deficiency
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Magnesium deficiency. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Magnesium_deficiency

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More for · 7
Magnesium Supplementation and Blood Pressure: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
2025
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Z, A., X, X., B, B., K, H., RM, T., & AE, S. (2025). Magnesium Supplementation and Blood Pressure: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.. doi.org. https://doi.org/10.1161/hypertensionaha.125.25129

The role of magnesium deficiency in the pathogenesis of hypertension and the influence of magnesium supplementation on blood pressure – literature review
2022
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Filip, B., Dominik, M., & Patrycja, B. (2022). The role of magnesium deficiency in the pathogenesis of hypertension and the influence of magnesium supplementation on blood pressure – literature review. zenodo.org. https://doi.org/10.12775/JEHS.2022.12.09.010

Association of Magnesium Intake with High Blood Pressure in Korean Adults: Korea National Health and Nutrition Examination Survey 2007–2009
2015
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Choi, M. & Bae, Y. J. (2015). Association of Magnesium Intake with High Blood Pressure in Korean Adults: Korea National Health and Nutrition Examination Survey 2007–2009. doi.org. https://doi.org/10.1371/journal.pone.0130405

INTRACELLULAR MAGNESIUM DEFICIENCY AND EFFECT OF ORAL MAGNESIUM ON BLOOD PRESSURE AND RED CELL SODIUM TRANSPORT IN DIURETIC-TREATED HYPERTENSIVE PATIENTS
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INTRACELLULAR MAGNESIUM DEFICIENCY AND EFFECT OF ORAL MAGNESIUM ON BLOOD PRESSURE AND RED CELL SODIUM TRANSPORT IN DIURETIC-TREATED HYPERTENSIVE PATIENTS. (n.d.). cir.nii.ac.jp. https://cir.nii.ac.jp/crid/1573387451877946752

Intracellular magnesium deficiency and effect of oral magnesium on blood pressure and red cell sodium transport in diuretic-treated hypertensive patients.
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Intracellular magnesium deficiency and effect of oral magnesium on blood pressure and red cell sodium transport in diuretic-treated hypertensive patients.. (n.d.). cir.nii.ac.jp. https://doi.org/10.1253/jcj.52.1249

The Role of Magnesium in Hypertension and Cardiovascular Disease -
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The Role of Magnesium in Hypertension and Cardiovascular Disease - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1111/j.1751-7176.2011.00538.x

Effects of Magnesium Supplementation in Hypertensive Patients
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Effects of Magnesium Supplementation in Hypertensive Patients. (n.d.). cir.nii.ac.jp. https://doi.org/10.1161/01.hyp.32.2.260

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