Walnut is a nutritious tree nut that grows within a hard shell encased in a wrinkled, brown kernel. Walnuts are rich in omega-3 fatty acids, antioxidants, vitamins, and minerals, making them a highly nutritious food choice.
They are often eaten raw as snacks or used in cooking, baking, and salads. Walnut oil is also extracted from the nuts and used in culinary applications.