The prevention of osteoporosis has largely focused on calcium supplements. While we can’t have strong bones without calcium, it isn’t enough. Bone mineral density is determined by complex metabolic processes involving a wide variety of vitamins and minerals, hormones, bone cells, and even external forces. Bones provide structure and protection for the body, but they are also an active organ, storing and releasing minerals like calcium as needed for the normal function of cells, muscles, and nerves.