Walnuts (Juglans regia) are a tree nut belonging to the walnut family.
They originated in the Mediterranean region and Central Asia, and have been part of the human diet for thousands of years.
Walnuts are most often eaten on their own as a snack. However, they can also be added to salads, pastas, breakfast cereals, soups and baked goods.
These nuts are rich in omega-3 fats and contain higher amounts of antioxidants than most other foods. Eating walnuts may improve brain health while also helping to prevent heart disease and cancer .
They are also used to make walnut oil, an expensive culinary oil often used in salad dressings. They are sometimes referred to as common walnuts, English walnuts or Persian walnuts.
Another related species of commercial interest is the eastern black walnut (Juglans nigra), which is native to North America.