A super complex, balanced formulation providing a high level of easily absorbable calcium forms (no calcium carbonate!). Magnesium, Boron, Zinc & Manganese, may help support normal bone health. Magnesium is essential for healthy bone structure; this formula provides extra magnesium (1:1 ratio with Calcium for optimal absorption by the body), together these contribute to normal muscle & nerve function. Plus Silica, Vitamin K & Vitamin D, which helps the body absorb & use Calcium.