Vitamin K Slows Coronary Artery Calcification An important new study shows that vitamin K can slow the progression of coronary artery calcification. That’s important because coronary artery calcification is a strong predictor of cardiovascular events. Coronary artery calcification is the buildup of calcium in the arteries of your heart, following the accumulation of fat and cholesterol. It makes it harder for blood to flow through and can lead to cardiovascular events, including heart attack. This new study suggests that vitamin K