Think outside the milk carton
Many greens are high in calcium, which gives you a lot more options in your quest. But you will need to be selective because your body can absorb the mineral from only certain types of these veggies. Take kale: Though it has less calcium per serving than spinach, your body absorbs 49 per cent of the nutrient, while it only gets a measly 5 per cent from spinach, the American Journal of Clinical Nutrition reports. Other calcium-rich greens that are easily absorbed include bok choy and Chinese cabbage.