Brazil nut
Brazil nuts, (Bertholletia excels) are some of the most healthful nuts on the planet. In Brazil, they are called 'castanhas-do-pará' - which translates as "chestnuts from Pará." Pará is a state in northern Brazil.
They are rich in protein and carbohydrates. They are also excellent sources of vitamin B-1 (thiamine), vitamin E, magnesium, and zinc.
Not only that, but they contain one of the highest amounts of selenium of any food; selenium is a vital mineral for maintaining thyroid function.
The nuts come in a hard shell and are often served prepared ready to eat, making them an excellent and nutritious, healthful snack.