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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The human body produces and destroys 15 million blood cells every second.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.