Most people are unaware of the importance of vitamin K to health. It works with many proteins, vitamins and minerals in our body to keep us healthy. Vitamin K is a fat-soluble vitamin that exists in two forms: vitamin K1 and vitamin K2. There is strong evidence that vitamin K promotes bone health and blood clotting, and these studies also suggest that vitamin K may help stabilize blood pressure levels and liver health, as well as improve memory in older adults. Vitamins K1 and K2 are found in different foods.