Calcium is the most abundant mineral in the body. 99 percent of the body’s calcium supply is stored in the bones and teeth, where it supports their structure and function. We ingest calcium from foods such as dairy, green leafy vegetables, and fortified foods (such as non-dairy milk, juice, and cereal). We can also find calcium in some medications, like antacids, as well as in supplemental form. However, it is best to receive your daily calcium intake through foods that are naturally rich in calcium whenever possible.