Joel K. Kahn, MD (born 1959) is a cardiologist and professor of medicine at Wayne State University in Detroit, Michigan (USA). He is also the founder of the Kahn Center for Cardiac Longevity and the owner of the GreenSpace Café. For over 30 years, he has treated serious heart diseases in a holistic manner with the goal of preventing heart attacks through public education and lifestyle and dietary changes. He has written articles for Reader's Digest and the Huffington Post, appeared on TV shows, and is the author of The Plant-Based Solution and co-author of Vegan Sex.