Red Speckled Beans The Red Speckled beans commonly known as the sugar bean is a legume. It is grown for its seed, which is eaten as a vegetable. It has high soluble fiber content. Soluble fiber absorbs water in the stomach forming a gel that slows down the absorption of the bean's carbohydrates. They can therefore help balance blood sugar levels while providing steady, slow-burning energy, which makes them a good choice for people with diabetes suffering with insulin resistance.