Diabetes Superstar Foods | ADA Beans. Kidney, pinto, navy or black beans are packed with vitamins and minerals such as magnesium and potassium. They are very high in fiber too. Beans do contain carbohydrates, but ½ cup also provides as much protein as an ounce of meat without the saturated fat. To save time you can use canned beans, but be sure to drain and rinse them to ...