Mark Sisson is a leading international authority on evolution-based health and fitness principles and the author of the international bestseller The Primal Blueprint. Besides blogging daily, Mark conducts seminars across North America and hosts an annual 3-day Primal retreat in California. He lives with his wife and children in Malibu, California. Mark, 60, is also a former fourth-place finisher in the Hawaii Ironman World Triathlon Championships. For more information visit his world-famous blog marksdailyapple.com.
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