A rarely discussed, but vital natural mineral – Selenium is an essential component of a healthy metabolism. Normally, it is consumed naturally in very small doses and deficiencies are rare. Still, a lack of Selenium is associated with numerous auto-immune diseases, making Selenium supplements a welcome addition to anyone’s daily diet. It’s important to note that Selenium is also a natural anti-oxidant, therefore contributing to overall tissue health, but it is not safe in extremely high doses as it can cause kidney, liver and heart problems. Make sure to research your recommended dosage of Selenium before you plan out your intake.