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Did you know?
There are more bacteria in your mouth than there are people in the world.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.