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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.