Magnesium is one of the body"s main electrolytes that participates in more than 300 reactions in the body, with an emphasis on those involved in energy production. Magnesium is also critical to many other bodily functions, including protein formation, bone development, enzyme and hormonal action, DNA production, nerve tissue function and muscle contraction. Additionally, magnesium seems to regulate the balance of calcium, sodium and potassium in our cells, particularly in our heart and blood vessels.