Beans and lentils are filling and packed with protein. They're a low-calorie addition to meals that are also loaded with fiber and can boost your metabolism, which can help you lose weight. Unlike other protein sources such as red meat, beans and lentils do not contain saturated fat, making them a heart-healthy alternative. There are tons of different kinds of beans such as black-eyed peas, garbanzo, black, pinto, navy, and more and various lentils such as red, yellow, green, and brown, so allow a little variety into your life and try different kinds until you find your favorites.