Vitamin K is essential for heart health because it helps facilitate the transport of calcium out of the bloodstream. This is done via calcium-regulating proteins in the arteries, which require vitamin K to work. Research shows that high intakes of vitamin K2 correspond with better arterial health. Low Dose Vitamin K2 Benefits:. Supports cardiovascular health. Vitamin K2 remains biologically active in the body longer than other K forms. Excellent alternative to potentially unhealthy diet-based K2 sources.