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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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.
Vaccines prevent between 2.5 and 4 million deaths every year.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.