Calcium is the most abundant mineral in the human body and makes up more than 1.5% of the body’s total weight. Approximately 99% of calcium resides in the bones and the remaining 1% is in the soft tissues of the body. Calcium is involved in the formation of the bones and teeth and is also necessary for the functioning of the muscles and nerves. Calcium should always be used according to the instructions of a pharmacist, physician or nutritionist.