Beans -- also known as legumes -- are healthy and inexpensive. They are high in fiber and protein and low in fat. Legumes are also rich in folic acid, copper, iron and magnesium. They even help lessen your appetite. Because beans have a low glycemic index, they provide energy over a long period of time by releasing slowly into the bloodstream.{relatedarticles} It's this quality that makes beans a perfect food for people with diabetes. The soluble fiber in beans binds to carbohydrates and slows their absorption into the bloodstream, and this slow rise helps regulate blood glucose levels. Best of all, it's easy to incorporate beans into your menu.