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The foods we eat contain a variety of vitamins, minerals, and other important nutrients that help keep our bodies healthy. We need to get enough of two nutrients in particular, calcium and vitamin D, to help keep our bones strong.
What does calcium do for our bones?
Calcium is a mineral. Our bodies contain many different minerals, such as iron and magnesium, but the most abundant mineral in the body is calcium.
Also, our bones are partly made of calcium salts (mixtures of calcium with other minerals), especially calcium phosphate. Calcium phosphate hardens and strengthens bone.
Our bodies cannot make calcium. We need to get calcium from foods and drinks, and supplements when needed, to build strong bones and teeth and to keep them healthy. Healthy bones are less likely to break if we fall.
What happens to our bones without enough calcium?
Calcium does more than build strong bone. It also helps our muscles, heart, and nerves work properly.
If we do not get enough calcium in our diets, our body takes the calcium we need from our bones. Over time, this process makes bones weaker and raises the risk of osteoporosis. Osteoporosis is a disease that makes bones weak and brittle, and people with osteoporosis have a higher risk of fractures (broken bones).
What foods have calcium?
The best food sources of calcium are milk and other dairy products, like cheese and yogurt. Other food sources of calcium include:
- Fish (such as salmon and tuna).
- Leafy green vegetables (such as kale and turnip greens).
- Tofu (set with calcium).
- Small fish with bones (including sardines and canned salmon).
- See the Bone Health and Osteoporosis: What it Means to You for several examples of calcium-rich foods.
Some foods and drinks are fortified with calcium. A food is fortified when the manufacturer adds vitamins or minerals that the food does not naturally have. Examples of foods fortified with calcium are certain brands of juice, soymilk, oatmeal, and breakfast cereal.
Some supplements contain calcium. Talk to your health care provider if you are thinking about taking a calcium supplement.
What does vitamin D do for our bones?
Vitamin D promotes bone health in these ways:
- Helps absorb the calcium we get from food.
- Along with calcium, helps protects older adults from osteoporosis.
- Promotes healthy functioning of our muscles and immune system. We need strong muscles to help us balance and reduce the risk of falling and breaking bones.
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