Pinto beans are a very good source of cholesterol-lowering fiber, as are most other beans. In addition to lowering cholesterol, pinto 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. When combined with whole grains such as brown rice, pinto beans provide virtually fat-free, high quality protein. But this is far from all pinto beans have to offer. Pinto beans are also an excellent source of molybdenum, a very good source of folate, and a good source of protein and vitamin B1 as well as the minerals phosphorus, iron, magnesium, manganese, and potassium.