Black beans are a very good source of cholesterol-lowering fiber, as are most other legumes. In addition to lowering cholesterol, black 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 rice, black beans provide virtually fat-free high quality protein. You may already be familiar with beans' fiber and protein, but this is far from all black beans have to offer. Medium black-skinned ovals; earthy, sweet flavor with a hint of mushrooms. Also known as turtle beans or black turtle beans. Black beans are only packaged dry but are not carried in all supermarkets. You might find them in stores that carry Spanish or Oriental foods. They are popular throughout Latin America. Cooking Time: 1-1/2 hours. Comments: Also called turtle bean, Mexican black and Spanish black bean. Uses: Most often used in thick soups or with rice; basic for many Mexican, Caribbean and Latin American soups and side dishes.