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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.