Light Speckled Kidney Beans also called Pinto beans are very high in both dietary fiber and protein, and are also a good source of vitamin B1, potassium, and iron. They are low in fat and cholesterol, which makes them an ideal meat substitute for those who are vegetarian; they are also a good way to perk up the nutritional content of traditional meat-containing meals. So long as they aren’t prepared with a lot of salt or butter, they are usually seen as a healthful addition to nearly any meal.