Calcium is the most abundant mineral in the body. About 99% is deposited in the bones and teeth. The remaining 1% is involved in the soft tissues, intracellular fluids and blood. Calcium is used in the development and maintenance of bone structure and rigidity. [url=http://www.angstrom-mineral.com/angstrom-minerals/angstrom-calcium-magnesium.html]Calcium Magnesium[/url]