Health and fitness expert Mark Sisson is a former elite endurance athlete with a 2:18 marathon and a 4th place Hawaii Ironman finish. The bestselling author of The Primal Blueprint, Primal Endurance, and The Keto Reset Diet, Mark is considered one of the leading voices of the Evolutionary Health Movement.

Mark's blog, MarksDailyApple.com, paved the way for Primal enthusiasts to both challenge conventional diet and exercise principles and take personal responsibility for their health and well-being. Today, Mark's efforts to promote primal living extend to his Primal Blueprint line of nutritional supplements, a book publishing company, and Primal Kitchen, our natural food product brand encompassing healthy mayonnaise ketchup, salad dressings, marinades, collagen bars, and other functional foods.