Vitamin K1 is critical for bone health, blood clotting, heart health, and brain health. Studies show it reduces mortality rates due to its role in the prevention of serious diseases, including heart disease and cancer. Meanwhile, deficiency has the opposite effect and can trigger several health problems. Vitamin K1 supplementation is shown to improve bone health, help prevent tooth decay and gum problems, eliminate excessive bleeding during menstruation, and preserve brain function as you age.