Blue Boost Vitamin K2-7 helps maintain bone density by promoting calcium transport from the bloodstream into the bone. Together, CALCITRIOL+CALCIUM+VITAMIN K2 7 helps improve bone strength and treats associated nutritional deficiencies. Calcium is essential for bone development at every stage of life.Vitamin K2  Vitamin D supplement are the perfect pair as D3 helps better absorption of Calcium and K2 directs the Calcium from the bloodstream to the bones. Better than any other vitamin d3+k2 supplements.Our Vitamin D tablets are sourced from LICHEN (veg source) and this form has highest bioavailability.enaquinone form of Vitamin K2 is absorbed 25x higher than any other form.Vitamin D3 k2 supplements help maintain optimum bone density by helping you absorb your calcium better.Vitamin K2-MK7 directs the Calcium from your blood stream to your bones for better absorption.