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.
Some animal research indicates that taking copper supplements may help slow or prevent arthritis, but more study is needed to prove this benefit occurs in humans. Selenium is a trace mineral found in tuna, whole grains, chicken, Brazil nuts and sunflower seeds.