Nutrition Geeks Vitamin D3 4000 iu & Vitamin K2 MK7 100 μ g High Strength | D3 K2, 365 Tablets. Each tablet combines Vitamin D 4000 iu with 100 μ g of K2. Vit D is crucial for bone health and immune support, while Vitamin K2 ensures calcium is deposited in your bones and not the arteries.