Dr. Joel Kahn: Benefits of a vegan diet, even for just a week or month, are real and dramatic -

Twice-monthly health columns are written by a practicing cardiologist, clinical professor at Wayne State University School of Medicine and founder of the Kahn Center for Cardiac Longevity in Bingham Farms. He's an author and has appeared on national TV, including "Dr. Oz" and "The Doctors Show." By Joel Kahn More people are switching to plant-based meals. Steakhouses have...