BioStacks

Best Magnesium for Heart

Top 10 products ranked

Last reviewed May 2026

Clinical dose: 100–400 mg

Why Magnesium for Heart

Magnesium plays a important role in heart. Cofactor in over 300 enzymatic reactions including energy production, protein synthesis, and nervous system regulation. Magnesium glycinate is preferred for calm and sleep support with minimal GI effects, threonate (Magtein) crosses the blood-brain barrier for cognitive benefits, and citrate has a mild laxative effect useful for constipation. In clinical studies, magnesium supports heart rhythm and bone health.

What dose to look for

Clinical studies typically use 100–400 mg of magnesium. Common clinical supplemental range; RDA for total intake is 310-420 mg. Products below this range may not deliver meaningful results.

What form to look for

Avoid magnesium oxide — low absorption (~4%). Avoid magnesium stearate — filler, not a bioavailable form. Look for magnesium glycinate or magnesium citrate for better absorption.

What the research says

Magnesium has strong clinical evidence for heart benefits. Meta-analyses confirm benefits for blood pressure, sleep, and glucose; ~50% of adults may be subclinically deficient Learn more

Clinical research on Magnesium

MODERATE — Meta-analyses support BP reduction; deficiency is widespread · 200–400 mg/day elemental magnesium

•2016 meta-analysis of 34 RCTs (2,028 participants) found magnesium supplementation (mean 368 mg/day) significantly reduced systolic BP by 2.0 mmHg and diastolic BP by 1.8 mmHg. PubMed
•Magnesium deficiency affects ~50% of US adults and is associated with increased risk of hypertension, arrhythmias, and atherosclerosis. Supplementation may primarily benefit those with inadequate intake.
•Blood pressure effect is modest in the general population. More pronounced benefits are seen in deficient individuals. Magnesium also improves endothelial function and reduces arterial stiffness.

See full Heart research →