Calcium is a key mineral. It helps your body maintain healthy teeth and bones. It helps your blood clot. And it helps your muscles and nerves work properly. That’s why it’s important to make sure you get enough in your diet. Some of the best sources of calcium are dairy products, such as low-fat milk, yogurt, and cheese. Other sources include beans, almonds, and dark green, leafy vegetables, like collard greens, kale, and spinach. And calcium is often added to foods like orange juice, cereals, tofu, and bread.