Bone is living tissue, and this formula supplies key bone nutrients in their most bioactive forms. Ossein microcrystalline hydroxyapatite complex supplies organic calcium with natural bone growth factors. Vitamin C assists bone matrix formation. Vitamin D and K are crucial to matrix calcification, along with magnesium, potassium, zinc, copper, manganese, and boron. Calcium Bone Maker Complex represents the most advanced clinical understanding of bone health. Calcium Bone Maker Complex is the new generation bone support supplement, designed from the new understanding of bone as dynamic, complex tissue. Its calcium source is MCH-CalTM ossein microcrystalline hydroxyapatite, supplying collagen and other bone matrix proteins and growth factors along with highly bioavailable calcium. This formula is strongly fortified with vitamin D as D3 (cholecalciferol) to help ensure its calcium actually becomes incorporated into bone. It also supplies vitamin K2 as menaquinone-7 (MK-7, the most bioactive vitamin K) to target calcium to bone and away from the soft tissues. The formula also provides generous allowances of vitamin C and the nutritionally essential minerals magnesium, potassium, zinc, copper, manganese, and boron, all necessary for ongoing bone health maintenance. About Doctors Best Doctors Best was founded in 1990 with the idea to create nutritional supplements rooted in research. From sourcing top-quality ingredients to working with the best manufacturers in the business, their science-based approach to nutrition sets them apart. Today, Doctors Best continue to uphold their founders belief that by trusting in science, good health will follow. They put in the work so you can thrive. Doctor`s Best Calcium Bone Maker Complex is the new generation bone support supplement. Provides bone matrix proteins and growth factors along with highly bioavailable calcium. Helps bone health maintenance.