A walnut is the nut of any tree of the genus Juglans, particularly the Persian or English walnut, Juglans regia. A walnut is the edible seed of a drupe, and thus not a true botanical nut. It is commonly consumed as a nut.

​Walnuts have a wealth of the good kind of fats -- polyunsaturated fats, which are better for you than saturated fats.

They also have a high amount of omega-3 fatty acids. Studies have shown that eating walnuts can help lower LDL (“bad”) cholesterol in particular, ​ but also lower your cholesterol overall.