Calcium


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Daily Value: 1,000 milligrams

Good Food Sources: Skim milk, nonfat yogurt, cheeses, collard greens, mustard greens, kale, broccoli, canned salmon with bones, sardines with bones, corn tortillas processed with lime, calcium-fortified orange juice

Calcium Sources

Calcium Sources

Description:

By now, just about everyone knows that getting enough calcium helps prevent diseases such as osteoporosis. Less well known is just how cal­cium goes about doing this.

When you eat cheese or drink milk, the calcium in these foods is absorbed through your small intestine and into your blood. The amount of calcium in your blood is regulated by a substance called parathyroid hormone. When calcium intake is low, parathyroid hormone signals for bone to be broken down, releasing calcium into the bloodstream. “Diets with adequate calcium intake produce less parathyroid hormone, so that we conserve more calcium and more bone,” says professor of nutrition. Read the rest of this entry »