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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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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.

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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

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Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

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