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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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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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Your heart beats over 36 million times a year.
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There are 60,000 miles of blood vessels in every adult human.
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People about to have surgery must tell their health care providers about all supplements they take.