The most integrated Vitamin D product on the market. This 4 month supply will provide 5000 iu of vitamin D per day ensuring the central role vitamin plays in a healthy resilient immune system.Integral-D is formulated with Vitamin K as MK7 than most leading products at 100 mcg ensuring optimal absorption by bone, for reducing arterial stiffness so blood delivery to delicate brain structures is optimized for the long term needs of the brain.Little attention is paid to the research on how Vitamin D when taken as a supplement and not manufactured by the body, requires trace minerals and nutrients in order for the Vitamin D to be utilized. We at Cyrene Labs have taken this research seriously and invested in a product that contains vitamin A, magnesium, zinc and boron.