Helps support nerve, muscle & heart function. † To learn more, click "View More Details" below. According to The National Health and Nutrition Examination Survey (NHANES), 59% of the US population has inadequate dietary intake of magnesium. Magnesium participates in more than 300 reactions in the body and is critical to many bodily functions such as helping to support nerve, heart, and muscle function, healthy bones and teeth, and assisting with converting carbohydrates, protein, and fat into cellular energy.