The organization and daily routine of a wagon train depended on the danger expected from the Native American tribes into whose territory it had traveled, the terrain, and the size of the caravan. Mormon trains, in particular, had a semi military formation.
Side effects. Taken at normal doses, selenium does not usually have side effects. An overdose of selenium may cause bad breath, fever, and nausea, as well as liver, kidney and heart problems and other symptoms. At high enough levels, selenium could cause death.
Selenium is one of many important dietary minerals, and we require a small amount of selenium in our daily diet. Selenium is incorporated in a small cluster of important proteins, each of which plays a critical role in our health. Scientists named these selenium-containing proteins selenoproteins..