This supplement is designed to support and boost the natural health and function of the bones to provide the user with the growth and development of the skeletal structure. Vital Nutrients' Osteo-Nutrients and Osteo-Nutrients II supplements are potent formulas designed to boost the health of your bones. Each bottle contains a powerful combination of calcium, vitamin D, and vitamin K2-7. Calcium is essential for the growth and development of the skeletal structure, while vitamin D ensures that calcium is being properly absorbed by the body. The vitamin supplement K2-7, also known as menaquinone, helps to bind blood calcium to bones, which in turn makes them stronger.