Joseph Keon is an investigative writer in the field of preventive medicine. He holds fitness expert certifications from both the Cooper Institute for Aerobics Research and the American Council on Exercise. In his work as a wellness consultant in the public and private sphere for over 20 years, Keon focused on chronic degenerative diseases and their relationship to modifiable lifestyle choices. He is a past member of the Board of Directors of the Wild Oats Wellness Foundation and Dr. Helen Caldicott's Nuclear Policy Research Institute as well as the Marin Health Council, an advisory to the Marin County Board of Supervisors. Keon is currently a member of the American College of Lifestyle Medicine. Keon is the author of three other books including Whitewash: The Disturbing Truth about Cow's Milk and Your Health.

Neal D. Barnard, MD, is an author, clinical researcher, and founding president of Physicians Committee for Responsible Medicine (PCRM). Barnard serves as Adjunct Associate Professor of Medicine at George Washington University School of Medicine. He founded the Barnard Medical Center in 2015 as part of PCRM, and it opened in 2016 with him as president; the center provides primary care and emphasizes diet and preventive medicine. Dr. Barnard has authored more than 90 scientific publications and 20 books, including Dr. Neal Barnard's Program for Reversing Diabetes, for medical and lay readers and is the editor in chief of the Nutrition Guide for Clinicians.