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 a mineral that functions as an antioxidant to protect your body from free radical damage. The best sources of selenium include meat, seafood, cereal, grains, dairy and a variety of fruits and vegetables.itamin A is not a single compound, but rather a family of substances called retinoids. Beta-carotene, which is the yellow-orange pigment responsible for giving foods their orange color, is a specific form of vitamin A that acts as an antioxidant in your body.