The combination of vitamin D3 and vitamin K2 provides superior support for the health and maintenance of normal bones. Vitamin D3 is the natural, most easily absorbed and utilized form of vitamin D. Vitamin K2 a is the most bioactive and bioavailable for of vitamin K. Together these vitamins work in tandem to support proper development of teeth and bones,  facilitate calcium and phosphorus balance in the blood, and promote healthy muscle function. Each great-tasting, chewable provides 2000 IU of vitamin D3 plus 75 mcg of vitamin K2. This formulation is NON -GMO, & third party purity tested