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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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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.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.