Exchange rate. This is the amount of foreign currency that will be generated for every dollar you send. For example, a service might have a rate of 12.48 Mexican pesos per dollar. So if you send $200, it'll convert to 2,496 pesos.
Selenium is a nutrient that the body needs to stay healthy. Selenium is important for reproduction, thyroid gland function, DNA production, and protecting the body from damage caused by free radicals and from infection.
Selenium as a supplement. Selenium is one of several nutrients known to have antioxidant properties, meaning selenium plays a part in chemical reactions that stop free radicals from damaging cells and DNA. Free radicals are unstable molecules from environmental toxins, or from byproducts of the human body's metabolism.elenium supplements in particular are purported to help people with asthma, and reduce the risk of rheumatoid arthritis and cardiovascular disease. Selenium levels drop with age, so some have claimed selenium can slow the aging process, cognitive decline and dementia.