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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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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.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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People about to have surgery must tell their health care providers about all supplements they take.