Health and fitness expert Mark Sisson is the New York Times bestselling author of The Keto Reset Diet and founding father of the ancestral health movement. His blog, MarksDailyApple.com, and Primal Blueprint lifestyle program has paved the way for primal enthusiasts to challenge conventional wisdom's diet and exercise principles and take personal responsibility for their health and well-being. From its humble - and controversial - beginnings in 2006, Mark's Daily Apple has grown into one of the highest-ranked health information resources on the Internet, with some three million unique visitors each month. An entrepreneur presiding over a wide-ranging primal enterprise, his fledgling Primal Kitchen healthy condiment line was acquired by Kraft-Heinz in 2018. Mark, 66, has a BA in biology from Williams College and is a former world-class endurance athlete, with a 2:18 marathon and a fourth-place finish in the Hawaii Ironman World Triathlon Championships to his credit. Today, Mark directs his competitive energies into high-stakes Ultimate Frisbee tournaments against competitors decades younger on the battlefields of Miami Beach, FL.