We use calcium specifications from decades-old research, so we need to make sure those numbers are still valid.
More than 90 percent of all calcium in the body is found in bones and teeth. Thus, calcium is the most important mineral when it comes to skeletal development and maintenance. Non-skeletal functions, in the form of ionized calcium, include muscle contraction and relaxation (birth procedure in sows), nerve conduction, regulation on blood clotting, and cell signaling in immune responses. Clearly, calcium is an important nutrient, although not always recognized as much as in human nutrition and medicine.