Vitamins D and K vitamins work together synergistically and play a central role in calcium metabolism, which is required to support heart and bone health. Vitamins K and D work together in this supplement to boost and modulate immune function, reducing inflammation and activating immune defenses, and helping to fight against pathogens like viruses, bacteria, and fungi. Our vitamin plus d capsules provide the bioavailable bone, heart, and tooth nutrients you need for maximum health benefits in an easy-to-swallow, convenient capsule. No fillers or preservatives, no unnecessary added ingredients just pure essential nutrients that support the maintenance of bone, tooth, and cardiovascular health. Our supplements are made from the very best, research-based non-gmo ingredients Made in a Gmp facility, our products are lab-tested by a third party to ensure the highest quality standards are maintained.