Selenium is a nutrient that is naturally present in many foods, added to others and is also available as a dietary supplement in pill, powder and liquid form, explains Perri Halperin, a nutritional ...

Selenium is an essential trace element that is contained in various proteins and has both nutritional and potentially toxic properties. Selenium mainly exists as selenocysteine (Sec) and ...

Our modern, industrial diets can be full of calories but paradoxically low in some important minerals. Having enough of these minerals, such as magnesium, is vital to good physical and mental health.