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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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There are more sensory neurons in the tongue than in any other part of the body.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.