Just Ingredients Vitamin D3 + K2 Complex supports healthy bones, teeth, joints, mood, and calcium metabolism.* This formula delivers 125 mcg of Vitamin D3 as VegD3®—a patented, plant-based form of cholecalciferol, the type of vitamin D your body naturally produces when skin is exposed to sunlight.* It also includes K2Vital® (MK-7), a patented form of Vitamin K2 that works with Vitamin D3 to help support distribution of calcium—guiding it to bones and teeth while helping to prevent accumulation in soft tissues such as arteries and lungs.*