Combining calcium, magnesium, and Vitamin D into one powerful supplement improves your bone health and strength much greater than any of the three on their own. Solaray Cal-Mag Citrate with Vitamin D does just that, providing high quality and easily absorbed minerals combined with specific vitamins and herbs. Calcium is essential for forming and maintaining strong bones and teeth, but since it is a mineral, some forms used in supplements are not easily used by the body. The form called calcium citrate is well absorbed, and so is the citrate form of magnesium used in this supplement.To actually use the calcium we eat in any kind of efficient way, our bodies need magnesium and Vitamin D. Without these two nutrients, we can't absorb the calcium we eat or use it to build, strengthen, and maintain bones. Cal-Mag Citrate with Vitamin D doesn't stop at supporting healthy bones. Magnesium is necessary for energy production and heart health, as well as assisting in detoxification. Unique to this supplement is an herbal base providing greater nutritional support. Solaray Cal-Mag Citrate with Vitamin D: maximum, effective support for bone health.