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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.