Brazil nuts are technically seeds, not nuts, but their brown nut-like casings have led most people to call them nuts. Most of the health benefits of Brazil nuts can be attributed to its high selenium content. Selenium is an important antioxidant that can protect from the harmful effects of free radicals. Free radicals are highly reactive particles that can oxidize and thereby, damage the body cells and tissues. Selenium can neutralize such free radicals and in the process, provide protection against a number of diseases including, heart disease. Selenium is also found to boost the immune system and promote the synthesis of glutathione, which plays an important role in minimizing free radical damage. Another important fact about Brazil nuts nutrition is that selenium is also required for the proper functioning of the thyroid gland. Apart from this, like other nuts, Brazil nuts can assist in controlling weight. High protein and fiber content of these nuts help to control hunger and thereby losing weight.