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Evidence reviewed: 2026-10-02
Essential nutrient with established physiological roles; supplement benefits depend on baseline status, outcome, form, and dose.
Magnesium is essential to many physiological processes. NIH ODS reviews evidence across blood pressure, diabetes, bone health, and migraine, but this does not support a single blanket therapeutic claim for all magnesium products.
Absorption differs by magnesium salt; citrate, chloride, lactate, and aspartate generally have higher bioavailability than oxide and sulfate.
Supplemental magnesium can cause gastrointestinal effects, and excessive amounts can be dangerous, especially with impaired kidney function.
Several products list magnesium or specific magnesium forms, but dose amounts are often absent. Form-specific cognitive claims, including for magnesium L-threonate, require separate direct evidence.
Magnesium Supplementation and Blood Pressure: A Systematic Review and Meta-Analysis of Randomized Controlled Trials (Systematic review, meta-analysis, and dose-response analysis of randomized trials; PMID 41000008)
Population/scope: 38 randomized trials; 2,709 participants
Evidence scope: Systolic and diastolic blood pressure
Finding: Magnesium supplementation modestly reduced blood pressure overall, with larger reductions in hypertensive participants on medication and in people with hypomagnesemia.
Limitations: High between-study heterogeneity; normotensive groups did not show clear benefit and no dose-response relationship was established.
Directness: Relevant human evidence · verified 2026-10-02
Important: Ingredient-level evidence is not proof that a finished product has the same effect. Dose, form, population, duration, and formulation must match.
For informational purposes only; not individualized medical advice.