The Calcium Needs of Man Calcium is the most abundant mineral in the body.
Every cell requires calcium.
Ninety-nine percent of the body's calcium is found in the bones and the teeth. Calcium is essential in proper blood clotting, nerve impulse function, muscle operation, and proper bone, teeth, and cartilage formation. Excess bed rest causes calcium loss. Perhaps this is due to lack of exercise which is important in calcium function in the body. Tests on astronauts indicated that they were losing 200mg.