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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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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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There are more bacteria in your mouth than there are people in the world.
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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.