LYCOS RETRIEVER 
Magnesium: Effect
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Magnesium metal is one of the most commonly used metals on the planet, because of its abundance (magnesium accounts for nearly 2.5 percent of the Earth's surface) and its versatility. Magnesium has a high strength-to-weight ratio, it is dent and impact resistant, it has immense damping capacity, and it maintains a low inertia. All of these traits make magnesium metal an effective material for parts that endure high-speed environments or that face frequent and sudden changes in speed.
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Magnesium preparations taken internally may cause hypermagnesemia, especially with prolonged use; electrolyte imbalance; and abdominal cramps when taken as a laxative. Milk of magnesia occasionally produces nausea or diarrhea. There are no known side effects of Epsom salts when used externally.
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Magnesium toxicity is highly unlikely because normal kidneys can remove magnesium extremely rapidly. Toxicity is more likely to occur in individuals who have renal problems. One main effect of excess magnesium intake is diarrhea.
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