English walnut, scientifically known as Juglans regia, is a species of walnut tree native to the regions of the Balkans, the Carpathian mountains, and Asia Minor. English walnut trees are now widely cultivated for their delicious, mild-flavored nuts, which are commonly known as English walnuts. They are an excellent source of healthy fats, particularly omega-3 fatty acids, which are beneficial for heart health. They are also a good source of protein, dietary fiber, vitamins (such as vitamin E and some B vitamins), and minerals (including magnesium and potassium).