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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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Everyone has one nostril that is larger than the other.
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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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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.