Magnesium may help sleep and lower blood pressure

Magnesium is an essential mineral involved in more than 300 chemical reactions in the body, and experts note it plays roles in nerve, muscle and heart function. A 2025 meta-analysis reported that magnesium supplementation over 12 weeks lowered systolic and diastolic blood pressure by a little over 2 mm Hg in randomized trials.

Magnesium is described as an essential mineral that supports many bodily functions, including nerve and muscle activity, blood sugar regulation, bone strength and a steady heartbeat. Nutrition experts quoted in the article note it appears in the DASH diet and can be linked to better sleep and modest blood pressure changes in studies. The piece also outlines who may be at higher risk of low magnesium and summarizes different supplemental forms. Key details: - Magnesium is involved in more than 300 chemical reactions and supports muscle, nerve, heart and metabolic functions. - Research noted in the article includes a 2026 clinical trial reporting cognitive improvements with magnesium L‑threonate in adults with poor sleep, and a 2025 meta-analysis that found about a 2 mm Hg reduction in both systolic and diastolic blood pressure after roughly 12 weeks of supplementation in randomized trials. - Average daily recommended amounts cited are about 310–320 mg for adult women (roughly 360 mg for teen girls and pregnant women) and 400–420 mg for adult men, and the article says dietary intake is the preferred source. - The article lists conditions that can raise the risk of low magnesium, including diuretic treatment, very poor diet, gastrointestinal diseases such as Crohn’s or celiac, alcoholism, severe vomiting or diarrhea, and complications of type 2 diabetes. - Different supplemental forms have different properties: magnesium oxide is poorly absorbed and can cause diarrhea; magnesium citrate is more bioavailable with a gentler laxative effect; magnesium glycinate is well absorbed and often used for relaxation with less laxative effect; magnesium L‑threonate is noted for raising brain magnesium and was the form used in the 2026 cognition study. - The article notes that excess magnesium from supplements can cause gastrointestinal symptoms and that a reported supplemental upper limit for women is 350 mg; it also reports experts recommending blood work and medication checks before starting supplements. Summary: The reporting presents magnesium as a widely used mineral with multiple physiologic roles and cites recent studies that suggest modest benefits for cognition, sleep-related outcomes and blood pressure. Undetermined at this time.