Calcium is the most abundant mineral in the body, about 99% of the bodyâs calcium is found in bone matter. Calcium is essential for maintaining strong bones & healthy teeth, proper function of the heart, nerves & muscle tissue & for normal blood pressure & clotting. Individuals who are allergic to dairy products or do not consume dairy products, the elderly, post-menopausal women, pregnant & lactating women, growing children, vegetarians & vegans may have an increased dietary requirement for calcium