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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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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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The horizontal fraction bar was introduced by the Arabs.