Immune & Bone Health Support* n D3-5,000 + K2-200 is a natural, soy-free, bioidentical vitamin D supplement. Vitamin D, considered both a hormone and a vitamin, is manufactured in response to skin’s exposure to sunlight and is essential to the body’s absorption of calcium. n This formula includes a natural vitamin K2 (as VitaMK7 ® † ) which supports enhanced utilization of calcium in the bloodstream.* It is an all-trans natural menaquinone 7 with the highest bioavailability and longest half-life in the blood.*