Brazil nuts come from the South American Bertholletia excelsa, or Brazil nut, tree. They are a good source of healthful fats, protein, fiber, and selenium.Despite its name, the Brazil nut is technically a seed rather than a nut. By definition, nuts are hard-shelled fruits that contain a single, large seed. Walnuts and pistachios are good examples.Brazil nuts may offer surprising and powerful nutritional benefits, including boosting heart health, providing antioxidants, and improving brain function.In…