klaire labs vitamin d plus k - 5000 iu vitamin d3 with vitamin k2 mk-7, bioavailable formula - bone, cardiovascular & immune support supplement (60 capsules) klaire labs supports healthy bone structure, cardiovascular function, and immune response.<br><br>vitamin d and k are structurally similar fat-soluble vitamins. synergistically, they support healthy calcium metabolism and bone mineralization throughout the body as well as a healthy calcium balance in vascular tissues.* vitamin d is also associated with cardiovascular disease risk factors*. recent studies have shown that vitamins d and k support healthy functioning of both innate and adaptive immune response.* klaire's vitamin d plus k is a bioavailable combination of 5,000 iu of vitamin d3 (cholecalciferol) and 100 mcg vitamin k2 (menaquinone-7, mk7).