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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.