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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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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

A depiction of a platypus from a book for children published in Germany in 1798 A depiction of a platypus from a book for children published in Germany in 1798
Because the leg muscles of children with muscular dystrophy are weak, they must perform the Gowers’ Because the leg muscles of children with muscular dystrophy are weak, they must perform the Gowers’
To examine a child’s ear, the pinna should be pulled back and up for children over 3 years; the pinn To examine a child’s ear, the pinna should be pulled back and up for children over 3 years; the pinn
Living arrangements of older adults in the United States vary widely depending on gender and ... Living arrangements of older adults in the United States vary widely depending on gender and ...
The Nutritional Needs of School-Aged Children Can Be Guided by MyPlate The Nutritional Needs of School-Aged Children Can Be Guided by MyPlate
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