People who eat more magnesium-rich foods have a lower risk of having a stroke, with each additional 100 mg of magnesium per day reducing stroke risk by about 2-13%.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
A systematic review and meta-analysis of RCTs could determine whether magnesium supplementation causally reduces stroke incidence in high-risk populations.
A systematic review and meta-analysis of at least 8 double-blind RCTs involving adults with hypertension, diabetes, or metabolic syndrome, randomized to 400 mg/day oral magnesium oxide or placebo for 5 years, with primary outcome being first-time stroke (ischemic or hemorrhagic) confirmed by imaging, secondary outcomes including blood pressure and inflammatory markers.
A large RCT could determine whether magnesium supplementation reduces stroke incidence in a high-risk population over time.
A multicenter, double-blind, placebo-controlled RCT with 10,000 adults aged 55-75 with hypertension and low dietary magnesium intake (<250 mg/day), randomized to 400 mg/day magnesium oxide or placebo for 5 years, with primary outcome being first stroke (confirmed by CT/MRI), secondary outcomes including blood pressure, serum magnesium, and cardiovascular events.
A prospective cohort study could assess whether baseline magnesium intake predicts future stroke incidence over time.
A prospective cohort study following 15,000 adults aged 45-75 without cardiovascular disease for 10 years, measuring dietary magnesium intake via repeated food frequency questionnaires and serum magnesium at baseline and year 5, and tracking stroke incidence via hospital records and imaging confirmation, adjusting for smoking, BMI, and medication use.
A cross-sectional study could identify whether individuals who recently had a stroke have lower average magnesium intake or serum levels than controls.
A cross-sectional study comparing dietary magnesium intake (via 7-day food diary) and serum magnesium levels in 500 adults hospitalized for acute stroke and 500 age- and sex-matched controls without stroke history, controlling for acute illness effects and medication use.
Case reports could document rare instances where magnesium supplementation was associated with reduced stroke risk in individuals with documented hypomagnesemia and high cardiovascular risk.
A case series of 10 adults with recurrent transient ischemic attacks and serum magnesium <0.7 mmol/L who received 400 mg/day magnesium citrate for 2 years, documenting stroke events, serum magnesium trends, and blood pressure changes.