The Brazil Nuts are the number one food source on the planet for selenium, which is a key nutrient for optimal health. These nuts are actually a seed from the Brazil nut tree that grows in South America. 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. The Brazil Nuts are very effective and made for commercial uses.