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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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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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On average, the stomach produces 2 L of hydrochloric acid per day.