Popularly known to be the ultimate brain food, the whole walnut is rich in fats, protein, and fiber, making it a fantastic and filling nibble in a hurry. Refresh Organic Walnut is soaked through low-temperature and then dehydrated to bring out its full nourishment potential. Walnuts are popularly known to be the ultimate brain food, the whole walnut is rich in fats, protein, and fiber, making it a fantastic and filling nibble in a hurry.