Magnesium: What is it?
Magnesium is the fourth most abundant mineral in the body and is essential to good health. Researchers estimate that the average person's body contains about 25 grams of magnesium. Approximately 50% of total body magnesium is found in bone. The other half is found predominantly inside cells of body tissues and organs. Only 1% of magnesium is found in the blood, but the body works very hard to keep blood levels of magnesium constant. Magnesium is needed for more than 300 biochemical reactions in the body. It helps maintain normal muscle and nerve function, keeps heart rhythm steady, supports a healthy immune system, and keeps bones strong. People normally get magnesium from their diet, but sometimes magnesium supplements are needed if blood magnesium levels are too low. New studies have documented low magnesium blood levels in African Americans, the elderly, and women. An easy way to remember foods that are good magnesium sources is to think fiber. Foods that are high in fiber are generally high in magnesium. Dietary sources of magnesium include legumes, whole grains, vegetables (especially broccoli, squash, and green leafy vegetables), seeds, and nuts (especially almonds). Other sources include dairy products, meats, chocolate, and coffee. Water with a high mineral content, or “hard” water, is also a source of magnesium. But, sadly as we get older our bodies become poorer at using magnesium, thus supplementation becomes a vital transport method for this life saving mineral. People take magnesium supplements to prevent or treat magnesium deficiency. MebMD states that: Magnesium deficiency is not uncommon in the US. It’s particularly common among African Americans and the elderly. Magnesium is use for diseases of the heart and blood vessels including chest pain, irregular heartbeat, high blood pressure, high levels of “bad” cholesterol called low-density lipoprotein (LDL) cholesterol, low levels of “good” cholesterol called high-density lipoprotein (HDL) cholesterol, heart valve disease (mitral valve prolapse), and heart attack, stroke prevention, to reduce muscular tremors associated with the elderly, to maintain mental clarity, to lessen mood swings, and to enhance sleep (through the enhance production of your bodies own serotonin). Magnesium is also used for treating attention deficit-hyperactivity disorder (ADHD), nervous anxiety, chronic fatigue syndrome (CFS), Lyme disease, fibromyalgia, leg cramps during pregnancy, diabetes improve glucose management, kidney stones, migraine headaches, weak or thinning bones (osteoporosis), premenstrual syndrome (PMS), altitude sickness, urinary incontinence, restless leg syndrome, asthma, hayfever, multiple sclerosis, the regulation of immunological and inflammatory dysfunction, and for preventing hearing loss. Athletes use magnesium supplementation to super charge energy and endurance. Some people put magnesium on their skin to treat infected skin ulcers, boils, and carbuncles; and to speed up wound healing. Magnesium is also used as a cold compress in the treatment of a severe skin infection caused by strep bacteria (erysipelas) and as a hot compress for deep-seated skin infections. (via. common Epson Salt) Many different companies that manufacturer magnesium supplements, but keep in mind that magnesium is in the salt or metal family and is in almost all non-refined foods. Most fast-food vendors have intently removed magnesium & potassium because these minerals, unlike sodium, will destabilizes flavors. Also keep in mind that magnesium is poorly stored in the human body. Thus, a daily intake of magnesium is required for a sustained optimum serum blood magnesium level. The US Food and Drug Administration (FDA) has set the 100% DV(Daily Value) of magnesium at 400 milligrams (mg) for a healthy person, but those that are magnesium deficient should set a two week supplementation goal of 1.745 grams (g) daily. Magnesium is non-toxic and at mega levels (typically those over 3 grams) can trigger rapid peristalsis and have a laxative effect. Warning: Chronic or excessive vomiting and diarrhea may also result in magnesium depletion. A loosening of stool is normal and should be expected when using Magnesium supplements.
Early signs of magnesium deficiency include loss of appetite, nausea, vomiting, fatigue, and general weakness. As magnesium deficiency worsens, numbness, tingling, muscle contractions and cramps, seizures (sudden changes in
behaviors caused by excessive electrical activity in the brain), personality changes, abnormal heart rhythms, and coronary spasms can occur. Severe magnesium deficiency can result in low levels of calcium in the blood (hypocalcemia). Magnesium deficiency is also associated with low levels of potassium in the blood (hypokalemia). Many of these symptoms are general and can result from a variety of medical conditions other than magnesium deficiency. It is important to have a physician evaluate health complaints and problems so that appropriate care can be given.
Who may need extra magnesium?
Magnesium supplementation may be indicated when a specific health problem or condition causes an excessive loss of magnesium or limits magnesium absorption. Some medicines may result in magnesium deficiency, including certain diuretics, antibiotics, and medications used to treat cancer (anti-neoplastic medication). Examples of these medications are: o Diuretics: Lasix, Bumex, Edecrin, and hydrochlorothiazide o Antibiotics: Gentamicin, and Amphotericin o Anti-neoplastic medication: Cisplatin Individuals with poorly-controlled diabetes may benefit from magnesium supplements because of increased magnesium loss in urine associated with hyperglycemia. Magnesium supplementation may be indicated for persons with alcoholism. Low blood levels of magnesium occur in 30% to 60% of alcoholics, and in nearly 90% of patients experiencing alcohol withdrawal. Anyone who substitutes alcohol for food will usually have significantly lower magnesium intakes. Individuals with chronic malabsorptive problems such as Crohn's disease, gluten sensitive enteropathy, regional enteritis, and intestinal surgery may lose magnesium through diarrhea and fat malabsorption. Individuals with these conditions may need supplemental magnesium. Individuals with chronically low blood levels of potassium and calcium may have an underlying problem with magnesium deficiency. Magnesium supplements may help correct the potassium and calcium deficiencies. Older adults are at increased risk for magnesium deficiency. The 1999–2000 and 1988–94 National Health and Nutrition Examination Surveys suggest that older adults have lower dietary intakes of magnesium than younger adults. In addition, magnesium absorption decreases and renal excretion of magnesium increases in older adults. Seniors are also more likely to be taking drugs that interact with magnesium. This combination of factors places older adults at risk for magnesium deficiency. It is very important for older adults to get recommended amounts of dietary magnesium. Doctors can evaluate magnesium status when above-mentioned medical problems occur, and determine the need for magnesium supplementation.
What is the health risk of too much magnesium?
Dietary magnesium does not pose a health risk, however pharmacologic doses of magnesium in supplements can promote non-life treating adverse effects such as diarrhea and abdominal cramping. Risk of magnesium toxicity increases with kidney failure, when the kidney loses the ability to remove excess magnesium. Very large doses of magnesium-containing laxatives and antacids also have been associated with magnesium toxicity. For example, a case of hypermagnesemia after unsupervised intake of aluminum magnesia oral suspension occurred after a 16 year old girl decided to take the antacid every two hours rather than four times per day, as prescribed. Three days later, she became unresponsive and demonstrated loss of deep tendon reflex. Doctors were unable to determine her exact magnesium intake, but the young lady presented with blood levels of magnesium five times higher than normal. Therefore, it is important for medical professionals to be aware of the use of any magnesium-containing laxatives or antacids. Signs of excess magnesium include changes in mental status, nausea, diarrhea, appetite loss, muscle weakness, difficulty breathing, extremely low blood pressure, and irregular heartbeat.
How does it work?
Magnesium is required for the proper growth and maintenance of bones. Magnesium is also required for the proper function of nerves, brain, muscles, kidney, heart, and many other as yet unknown bodily systems through a newly discovered systems known as cellular signaling.
Final Note on Type 2 Diabetes: Hypomagnesemia(or too little magnesium) is a common in patients with
type 2 diabetes. Although diabetes can induce hypomagnesemia, magnesium deficiency has also been proposed as a risk factor for type 2 diabetes. Magnesium is a necessary cofactor for several enzymes that play an important role in glucose metabolism. Animal studies have shown that magnesium deficiency has a negative effect on the post-receptor signaling of insulin. Some short-term metabolic studies suggest that magnesium supplementation has a beneficial effect on insulin action and glucose metabolism. The Office of Dietary Supplements (ODS):
http://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/