Mark Sisson is a health and fitness expert, entrepreneur, author and the founding father of the ancestral health movement.

He's a former world-class endurance athlete with a 2:18 marathon and a fourth-place finish in the Hawaii Ironman World Triathlon Championships.

Mark's blog, MarksDailyApple.com and Primal Blueprint lifestyle program have paved the way for primal enthusiasts to break free from conventional wisdom's diet and exercise principles.

His latest book is Two Meals a Day: The Simple, Substainable Strategy to Lose Fat, Reverse Aging, and Break Free from Diet Frustration.

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