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.
1 Some research shows that taking a 100-200 mcg of a specific selenium supplement (SelenoPrecise, Pharma Nord, Denmark) daily for 6 months can modestly reduce cholesterol levels. 2  Many people in this study had low levels of selenium in their body before the start of the study. Heart disease. 2  Taking 100 mcg of selenium in combination with beta-carotene, vitamin C, and vitamin E does not seem to prevent heart disease from becoming worse. 3  Also, taking 200 mcg of selenium daily for almost 8 years does not reduce the risk of developing heart disease.