Milk is one of the best sources of dietary calcium but it turns out that most of us don’t get enough in our diets. It is a particularity important nutrient when it comes to bone health. Our bones are compared to a calcium bank. As you eat food that contains calcium, that calcium is stored in this bank. This bank then donates calcium to your blood to make sure your blood levels always remain within the normal range. If your body does not get enough calcium from food, you can lose calcium from your bones.