Premium Vitamin K2 and Vitamin D3 in easy to use liquid drop form 4 mcg of vitamin K2 per drop. Sourced from all-trans Menaquinone-7 (MK-7), the most natural, pure, and fully bioactive form of K2. 100 IU of Vitamin D3 per drop. Naturally sourced from sheep wool. Vitamin K2 and Vitamin D3 are natural partners, with synergistic effects when taken together.