Calcium is the most abundant mineral in our body. We store most (~99%) of it in our bones and teeth as hydroxyapatite, a large molecule that combines calcium, phosphorus, and oxygen.

The remaining small amount circulates through our body. This circulating calcium plays many important roles, including constricting or relaxing our blood vessels, sending nerve impulses, contracting and relaxing our muscles, and releasing hormones like insulin when they are needed. Calcium even plays several key roles in our blood clotting along with Vitamin K!

Unfortunately, calcium is a nutrient of concern with a significant portion of our population not eating enough.