Peanuts (Arachis hypogaea) are a legume that originated in South America.
They go by a variety of names, such as groundnuts, earthnuts, and goobers.
Despite their name, peanuts are unrelated to tree nuts. As a legume, they’re related to beans, lentils, and soy.
Peanuts are rich in protein, fat, and various healthy nutrients. Studies show that peanuts may even be useful for weight loss and are linked to a reduced risk of heart disease.