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There are more bacteria in your mouth than there are people in the world.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.