I have been working with Davina Sandground, a health and nutrition counselor, on a variety of workshops focusing on topics such as Calcium without Dairy, Raw Eating and an upcoming one about Sugar. During a discussion about foods that can bolster your immune system she told me that she eats 2 brazil nuts a day. Brazil nuts are a great source of selenium, a trace mineral that you only need a little bit of. I learned that selenium is used in creating important antioxidant enzymes that help prevent cellular damage from free radicals which are believed to contribute to the development of chronic diseases such as cancer and heart disease. In addition selenium is critical for proper thyroid function and helps bolster the immune system. I consider a brazil nuts to be delicious --So, I now eat 2 brazil nuts a day as a treat.