Only about half of people in the United States get the recommended daily allowance of Magnesium (400-420mg/day for men; 300-310mg/day for women). This is troubling to many experts, since a significant number of previous trials have shown that meeting the RDA for magnesium helps both healthy subjects and those with metabolic impairment (type 2 diabetes, insulin resistance, high fasting glucose, high blood pressure) improve markers after only a few months. Low magnesium diets have been shown to increase these risk factors.
A recent study completed with data from the National Heart, Lung and Blood Institute attempted to find out if these results are consistent long-term (<5 years), and whether or not magnesium intake can help in diabetes prevention and stop its onset in those with extant metabolic impairment.
It was found that meeting the RDA for magnesium every day might lower type 2 diabetes risks.