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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.
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.