{"claimId":"clm_ec_b7-mg-heart","version":1,"status":"current","verdict":"Magnesium for heart health: Grade B at moderate certainty. Meta-analysis of 38 RCTs (2709 participants): magnesium supplementation modestly lowered blood pressure — systolic by about 2.8 mm Hg and diastolic by about 2.0 mm Hg versus control. A small but consistent blood-pressure effect; not shown to reduce cardiovascular events directly.","direction":"benefit","magnitude":{"metric":"other","value":null,"unit":"","ci95":null,"humanReadable":"Meta-analysis of 38 RCTs (2709 participants): magnesium supplementation modestly lowered blood pressure — systolic by about 2.8 mm Hg and diastolic by about 2.0 mm Hg versus control. A small but consistent blood-pressure effect; not shown to reduce cardiovascular events directly.","baselineAbsoluteRisk":null},"certainty":"moderate","clinicalMeaning":"small_but_potentially_useful","applicability":{"appliesTo":["adults"],"doesNotApply":["children"],"unknown":["pregnancy"]},"safetyQualifiers":["minor_with_ssri"],"evidenceBundleId":"eb_ec_b7-mg-heart","citations":[{"pmid":"41000008","design":"peer-reviewed"}],"reviewedBy":{"name":"Substrate editorial","credential":"Independent research collective"},"reviewedAt":"2026-07-16T16:23:36.633Z","dateModified":"2026-07-16T16:23:36.633Z","methodologyVersion":"v1","methodologyDoi":"https://doi.org/10.5281/zenodo.21364236","canonicalUrl":"https://evidencebased.info/interventions/magnesium/heart-health","attribution":"Substrate (evidencebased.info), claim clm_ec_b7-mg-heart v1, reviewed 2026-07-16","license":"CC-BY-4.0 — attribution with link required"}