To be or nut to be.
Peanuts are not nuts — they are actually part of the legume family, and are more closely related to the chickpea than the cashew.
The peanut is high in good monounsaturated fats, which reduces the risk of heart disease. They are also a better source of antioxidants than apples, although this is no excuse to replace them in your "five-a-day count" as they still have a high calorie content.
The breakdown: A cup of peanuts (114 g) is 862 calories, 76g of fat and 40g of protein.