Over half a million Americans die of heart disease annually. It is the number one leading cause of death in the United States. There are a variety of different types of heart disease but coronary artery disease, or CAD, is the most common. CAD is primarily caused by a buildup of cholesterol and plaque in the artery walls. The good thing about CAD or other types of heart disease is that they can often by prevented through exercise, weight-loss, diet and stress management. Whether you are young or old, heart disease prevention is important at every age. HealthLabs.com has put together a list of 25 unique and up-and-coming hearty-healthy bloggers that help keep hearts happy and healthy.