Why change my eating habits now? I’ve been eating junk food all my life, you say. Dr. Joel Fuhrman, a board-certified family doctor and leader in nutritional medicine, promises that, when eating right, most of us can prevent a heart attack or a stroke. Author Joel Fuhrman, MD and nutritionist Cardiovascular disease kills more individuals than all cancers combined, he said. For example, you can stop smoking at any point before you develop lung cancer and reduce your chances of