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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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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.