Magnesium: is necessary for good function of nerves and muscles. It allows muscles to relax after a contraction, calms the nervous system, functions in many enzyme systems and is necessary for regulation of the heartbeat. It is the second most prevalent mineral inside the cells (potassium is first) where it assists with the integrity of DNA and its counterparts. Increases are mainly found in kidney disorders, use of certain antacids and regular use of magnesium sulfate type enemas. Decreases are seen in cardiac arrhythmia, muscle spasm and cramps, and some viral disorders. National Health and Nutrition Exam Survey suggests intake is often inadequate. Just about EVERYONE of us is functionally LOW. Patient Information Leaflet (PIL): www.askdrskip.com/magnesium