Lack of adequate dietary calcium or an increas in bone resorption (breakdown) relative to formation, results in decalcification of bones. This can cause a loss of bone strength and thinning of bones, which is something of concern to women in their menopausal years. Source Naturals introduces a new ingredient -- Ostivone brand of ipriflavone. Clinical studies on post-menopausal women have shown that ipriflavone, a naturally occurring isoflavone, Enhances to maintain bone mineral density when combined with calcium. Bone Renew combines clinical amounts of ipriflavone with three hihgly absorbable forms of calcium. Bone Renew can Enhance support and maintain a healthy skeletal ststem, especially during the menopausal years when bone loss increases.