Vitamin D has been shown in an ever-growing body of literature to support disease prevention and the maintenance of optimal health. Biogenetix D3K2 is a concentrated, synergistically blended Vitamin D/Vitamin K formula for optimal absorption. Research suggests that if Vitamin D is to be dosed at therapeutic levels, Vitamin K is absolutely critical in proper application. Vitamin K has the all-important role of promoting proper Vitamin D utilization without causing calcification of muscles, arteries, or veins. Biogenetix uses natural Vitamin K2, called MK-7, for optimal results.