Turnips

One cup of turnip greens contains 197 milligrams of calcium, almost one fifth of the recommended daily value for adults. Calcium helps to prevent bone softening, fractures and osteoporosis and supports the health of your teeth. Turnip greens also contain 292 milligrams of potassium, a mineral that enhances muscular strength and endurance during physical activities. Add chopped turnip greens to vegetable casseroles and salads or steam them lightly and enjoy them with brown rice or legumes.