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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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There are 60,000 miles of blood vessels in every adult human.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.