The walnut is considered the healthiest nut due to its high amount of omega-3 fatty acids, which help fight inflammation, and antioxidants, which help fight heart disease and cancer. Additionally, walnuts contain manganese, which may provide relief from symptoms of premenstrual syndrome.
Other healthy nuts include almonds, cashews, pecans and Brazil nuts. Almonds are rich in fiber, vitamin E and omega-3 fatty acids, while cashews are rich in iron, zinc and magnesium. Pecans are antioxidant rich, and Brazil nuts may help prevent certain forms of cancer.
To get the most health benefits from nuts, they should be eaten raw or dry roasted, and nuts covered in chocolate, sugar or salt should be avoided.