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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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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.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.