Bone is living, growing tissue that contains blood vessels and nerves. It is made mostly of collagen, a protein that provides a soft framework for bones, and calcium phosphate, a mineral that adds strength and hardens the framework. More than 99% of the body’s calcium is contained in the bones and teeth. The remaining 1% is found in cells, blood, and other body fluids. Normal healthy bones are an important part of maintaining the general health of the human body. Healthy bones enable a person to enjoy many of life’s activities.
For proper bone health, it’s important to consume adequate calcium. During childhood, we are able to absorb up to 75% of the calcium we consume, but as growth slows, so does the calcium absorption rate. Teens absorb 20 to 40% of ingested calcium and adults, on average, absorb only around 15%. Also, according to USDA food intake surveys, most American women consume only about half as much calcium as recommended.
While calcium is the primary factor in maintaining proper bone structure and function, it is not the only one. Minerals such as boron and magnesium also contribute to proper bone health. In addition, vitamin D helps the body absorb calcium and vitamin C is essential for the normal formation of collagen, which is necessary for normal bone structure and function.
There are many natural sources of calcium but most people find it necessary to enhance their diet with a calcium supplement.
