popular beans are kidney shaped and are especially good in simmered dishes where they absorb the flavors of seasonings and the other foods with which they are cooked. Kidney beans are a very good source of cholesterol-lowering fiber, as are most other beans. In addition to lowering cholesterol, kidney beans' high fiber content prevents blood sugar levels from rising too rapidly after a meal, making these beans an especially good choice for individuals with diabetes, insulin resistance or hypoglycemia.