✔ EXPERTLY FORMULATED - Our Vitamin D3 & K2 MK-7 is an expertly blended formulation of high quality Vitamin D3 4000IU and 100mcg of fully bioactive, all trans Vitamin K2 MK-7. We use K2 from Kappa Bioscience which is backed by 22 clinical trails to back up the effectiveness of the K2.