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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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On average, the stomach produces 2 L of hydrochloric acid per day.
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People about to have surgery must tell their health care providers about all supplements they take.