Neal Barnard, MD, is a clinical researcher, health advocate, and New York Times bestselling author. He has been the principal investigator or coinvestigator on several clinical trials investigating the effects of diet on health. He is the author of numerous scientific and medical publications and more than fifteen books for lay readers. He is frequently called on by news programs to discuss issues related to nutrition, research issues, and other controversial areas in modern medicine.

Marilu Henner is a New York Times bestselling author, a healthy living coach, and five-time Golden Globe nominee. She lives in Los Angeles with her family.

Marilu Henner is a New York Times bestselling author, a healthy living coach, and five-time Golden Globe nominee. She lives in Los Angeles with her family.

Joe Knezevich is an audiobook narrator and award-winning actor. He earned a BFA in acting from Florida State University and studied in London. In addition to his work on the stage, he has appeared in many roles on the small screen and in film, including in The Change Up, Parental Guidance, 42, The Last of Robin Hood, and Allegiant.