Roasted, salted peanuts are high in sodium, which health professionals link to heart disease. That said, eating roasted, salted peanuts as part of a balanced diet is okay. As with most foods, the key to enjoying peanuts is eating them in moderation as part of a healthful, calorie controlled diet. Peanuts are rich in protein, fat, and fiber. While peanuts may have a large amount of fat, most of the fats they contain are known as good fats. These kinds of fats actually help lower your cholesterol levels.