Osteo Protect is specifically formulated to offer two of the most highly absorbable forms of calcium, including citrate and hydroxyapatite. To further enhance absorption, all the necessary cofactors for calcium utilization are included. Osteo Protect relies not only on calcium, magnesium, and vitamin D for assisting in increasing bone mass but also other proven nutrients to support bone health. This unique and comprehensive formula is great for women and men of all ages.