Description: - "Magnesium is one of the body's major electrolytes, along with potassium, calcium and sodium. When dissolved, these minerals form the salty, electricity-conducting soup that bathes and permeates the cells of our body - in blood serum, spinal fluid and intracellular liquid. Magnesium is known to be involved in many functions, including enzyme and hormonal actions...(it) seems to regulate the balance of calcium and sodium in our cells, particularly in our heart and blood vessels...adequate intake of magnesium helps our hearts to beat smoothly and regularly and withstand the stress and abuse of daily life. It also means magnesium helps our blood vessels remain open and relaxed, lowering our blood pressure." (from "The Complete Book of Vitamins and Minerals for Health")