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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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There are 20 feet of blood vessels in each square inch of human skin.
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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).