A recent meta-analysis of studies on magnesium reveals that the increased intake of magnesium is associated with decreased risk of stroke. (Larsson SC, Orsini N, Wolk A. Dietary magnesium intake and risk of stroke: a meta-analysis of prospective studies. Am J Clin Nutr 2012;95:362-6.)
Magnesium supplementation has been shown in other research to reduce blood pressure, fasting insulin levels, have favorable effects on blood sugar and blood lipid concentrations and reduce the susceptibility of lipoproteins to peroxidation. This current study found that an increased intake of 100 mg of magnesium is associated with an 8% decreased risk of stroke. Rich food sources of magnesium include green leafy vegetables, beans and whole grains. I recommend taking at least 200 mg of magnesium per day through either your multivitamin or by adding magnesium glycinate or citrate, in addition to eating a healthy diet. Take 400-600 mg divided into 200 or 300 mg taken several times per day if you are dealing with high blood pressure or muscle spasms.