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Good Sources of Calcium

good sources of calcium

Dairy

Dairy foods are most often recommended for calcium intake because these foods provide a form of calcium that is easily absorbed by the body (high bioavailability). Additionally, many dairy foods are fortified with vitamin D, which is needed for calcium absorption.

Calcium in common dairy foods:

Skim milk (1 cup) - 300 mg

Low fat vanilla yogurt (1 cup) - 400 mg

Cheddar cheese (1 oz.) - 200 mg

Other Natural Sources of Calcium

If you are lactose intolerant, do not like dairy, or follow a vegan diet, you will need another source of calcium. The good news is that there are plenty of other foods that naturally contain calcium. According to the Linus Pauling Institute at Oregon State University, broccoli, bok choy (Chinese cabbage), mustard greens, turnip greens, and kale have a similar calcium bioavailability to dairy.

Below is a list of non-dairy foods that contain calcium:

Tofu made with calcium sulfate (79 g) - 100 mg

Canned salmon with bones (3 oz.) - 181 mg

Canned sardines with bones (1 oz.) - 108 mg

Broccoli (1 cup, cooked) - 60 mg

Bok choy (1 cup, cooked) - 158 mg

Collard greens (1 cup, cooked) - 266 mg

Kale (1 cup, cooked) - 94 mg

Mustard greens (1 cup, cooked) - 104 mg

Turnip greens (1 cup, cooked) - 197 mg

Calcium Absorption

There are several factors that influence how well your body can absorb calcium. Vitamin D intake is important for calcium absorption. Some foods contain phytates and oxalates, which decrease the amount of calcium that can be absorbed by the body. Phytates are found in unleavened bread, seeds, and nuts. Oxalate is present in spinach and rhubarb. And finally, a high intake of sodium or protein can cause the loss of calcium through urination.

Supplements and Fortified Foods

You can easily find foods which are fortified with calcium, such as calcium-fortified soy milk and orange juice. These are decent sources of calcium, but not as good as dairy or other foods that naturally contain calcium (again, because of how well it can be absorbed). To determine whether a food is a good source of calcium, check the food label. If the "percent Daily Value" (%DV) of calcium is 20 percent or more per serving, the food is considered high in calcium.

Most health professionals agree that food is the ideal way to get your calcium, but supplements can be used if you are not meeting your calcium needs through food. Just remember that a supplement should be used to support a healthy diet, not as a substitute for nutritious foods. If you do take calcium supplements, take them between meals, in 500 mg doses or less, and do not take them at the same time as iron supplements.

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