Bone Builder Prime 90 tabs by Metagenics (Formerly Cal Apatite Plus)Cal Apatite Plus provides a unique combination of the same calcium rich MCHC found in original Cal Apatite, but with key nutritional factors added to help maintain healthy bone density. Features ipriflavone, a unique isoflavone derivative that helps support healthy bone metabolism. Supplies vitamin D, an essential nutrient for the maintenance of healthy bones that stimulates intestinal calcium absorption and helps to regulate calcium and phosphorus