Calcium: General Facts

Calcium is the most abundant mineral in the human body. The teeth and bones contain 99% of the body's calcium. The remaining 1% is in the extracellular fluids and blood. Calcium is one of the 6 macrominerals in the body, the others being magnesium, sodium, chloride, potassium, and sulfur. The macrominerals account for 4 - 5 % of total body weight. Approximately half of this weight comes from calcium.