Even though magnesium deficiency is associated with every known disease, and many authorities believe that approximately 80 % of the population is magnesium deficient, doctors traditionally never measure magnesium reserves in their patients to determine if they are adequate. Instead, they check serum levels, which are carefully regulated by the body in a relatively narrow range. The body keeps the blood level of magnesium constant, because magnesium is a vital electrolyte which helps to regulate vital functions such as heart rate, blood pressure, body temperature, breathing, and other important processes. So testing the serum level is a good idea for someone in the Emergency Room, But everywhere else, it's a pointless test because it provides no indication of whether your magnesium reserves are adequate to keep your body performing properly for a week, or whether you might run dangerously low in a few hours. Ever wonder where all the medical issues come from as you get older? They come from a weakened immune sustem caused by low magnesium reserves, year after year. decade after decade. This book describes the reasons for the problem, backed up by plenty of published medical research. And it offers guidelines so that you can begin to manage your magnesium levels properly, to insure that you can live a long and healthy life.