To give your bone-mineral density a protein boost, try incorporating high-quality soy foods like edamame into your diet a few times each week. Besides calcium, edamame also delivers a dose of magnesium as well as potassium, another nutrient that helps maintain bone strength. Buy edamame in the pod and steam or microwave a cup’s worth, snap them open, and pop ’em in your mouth for a quick and delicious snack. You can also buy frozen, shelled edamame to toss into salads, stir-fries, and pasta recipes.