By Annette R. Karnash, R.N., M.N.
Of all the essential minerals necessary to maintain life, magnesium is perhaps the most important for preventing and reversing signs of neural and neuromuscular overexcitement. Magnesium is a key element in stabilizing the nerve cell. Without it, the nerve would be in a constant state of excitement, known as tetany.
Magnesium is usually part of a salt such as magnesium hydroxide, or “milk of magnesia” and Magnesium sulfate of “Epsom salts” both of which are used in treating disorders of the G.I (gastrointestinal) tract. Magnesium carbonate is a key ingredient in arthritic strength Bufferin.
Magnesium gets its name from the Greek city of Magnesia where large amounts of magnesium carbonate, used as a laxative during the Italian Renaissance, were located. Magnesium is the central element in the chlorophyll molecule, just as iron is central in the hemoglobin molecule. In fact, hemoglobin and chlorophyll are almost essential substances, except for the magnesium-iron substitution. It is possible to equate iron and magnesium as the two most fundamental elements in the two most important life cycles on the planet. Magnesium plays a central role in regulating the distribution of electrolytes and nutrients throughout the body. Magnesium had been successfully used to prevent heart attacks and Congestive Heart Failure, and magnesium deficiency is definitely associated with such conditions. A deficiency of magnesium may produce convulsions, vasodilatations, tremors, depression, muscles twitch and increase the incidence and severity of leg and muscle cramps, especially “jumpy leg syndrome”, a common complaint of the aging individual. All of these are symptoms of an unstable neural membrane, whether in the heart, brain, G.I. tract, muscle or blood vessels.
Conditions which may cause magnesium deficiency include severe stress, sleep loss, use of antibiotics, diabetes, cirrhosis, arteriosclerosis, fasting and dieting, diuretic abuse, alcohol and drug abuse, chronic diarrhea and vomiting. In today’s world, where so much emphasis is placed on obtaining adequate calcium, it is important to increase magnesium intake if additional calcium is taken to prevent osteoporosis. Magnesium and calcium compete for the same absorption sites in the G.I. tract so that high concentrations of one or the other usually results in poor absorption of the lesser. If calcium consumption is high, magnesium consumption must also be increased. Whereas calcium is an activator, as in muscle contraction and nerve excitability, magnesium is a depressor, as in nerve and muscle relaxation. They counterbalance each other.
The normal recommended daily does of magnesium for adults is 400mg. The typical American diet provides only about 120 mg daily. Magnesium can be found in whole grains, nuts, beans, green leafy vegetables, milk, potatoes, meat and eggs. Cooking in boiling water however, results in the heavy loss of magnesium.