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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 immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.