Description Ostivone Rx-Bone is a precisely calibrated nutritional formulation born from leading-edge scientific studies and clinical evaluation. Each tablet provides pure ipriflavone, a natural flavonoid derived from isoflavones. Ostivone Rx-Bone combines carefully gauged ratios of ipriflavone, calcium and Vitamin D for maximum nutritional support of the skeletal system. Ostivone Rx-Bone is a unique specialty formula designed for any individual concerned with promoting healthy bones.