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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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).
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.