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.
To help offset risks linked to a selenium deficiency, taking selenium supplements can be recommended. Usually, selenium can be taken as a component of a vitamin-mineral supplement or as a nutritional antioxidant formula.