300 mg Calcium + 200 IU Vitamin D Essential for Healthy Teeth and Building Strong Bones* For us to function properly calcium is ESSENTIAL! To maintain our cardiovascular system, nervous system and the capability of our blood to clot...calcium is vital! In addition, calcium keeps our bones and our teeth strong. A lack of calcium in the system can have a detrimental effect on the human body as it ages. To avoid the depletion of calcium from our bones, we must properly absorb it from the food we eat. In order to do this...we need Vitamin D. By the age of 17, 90% of our bone mass has already been established. This bone 'bank' is open for a relatively short period of time making it imperative that your child receives enough calcium on a daily basis!