Meet Mark

Let me introduce myself. My name is Mark Sisson. I’m 63 years young. I live and work in Malibu, California. In a past life I was a professional marathoner and triathlete. Now my life goal is to help 100 million people get healthy. I started this blog in 2006 to empower people to take full responsibility for their own health and enjoyment of life by investigating, discussing, and critically rethinking everything we’ve assumed to be true about health and wellness...

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We spend thousands of hours every year researching health questions in order to serve you research-based information and actionable tips on Mark’s Daily Apple each day. While the Primal Blueprint approach to health, well-being, and weight management might not always align with conventional practice, the principles you find here are founded in peer-reviewed medical research from the fields of nutritional science, exercise science, epigenetic study, and behavior change. This blog isn’t intended as medical advice, but we hope it will be an informative and inspiring source as you pursue a healthy, fulfilling life.

Mark Sisson

Welcome to Mark’s Daily Apple, the blog that built awareness and authority for Mark Sisson and the Paleo/Primal lifestyle. Considered by many to be the Google of ancestral health, Mark’s Daily Apple covers all topics related to thriving in the modern world with Primal strategies.

Mark founded this site in 2006 to fulfill his personal mission: to empower people to take full responsibility of their own health and enjoyment of life by investigating, discussing, and critically rethinking everything we’ve assumed to be true about health and wellness. More than a decade ago, when Mark started this blog, he was one of the first bloggers to write prolifically about the Paleo movement. After years of self-experimentation, which included using his own body to test which foods, types of movement, and lifestyle changes made the most positive impacts on his health and wellness, Mark pioneered his own version of the Paleo diet. He investigated the principles of the Paleo diet, conducted vigorous research, applied what worked well in his self-experiments, and listened to what worked for others to devise the Primal Blueprint—Mark’s original take on how to thrive in the modern world armed with lessons learned about the ways our ancestors lived.

Mark’s Daily Apple has come a long way in more than a decade. If you want proof, just check out what the original blog looked like:

Mark's Daily Apple original blog image

Pretty sharp, huh? Of course, all things change over time, and Mark’s never been one to be idle and not tinker. Publishing nearly every day for more than a decade means there’s plenty of Primal content to read, from deep-dive, research-laden definitive guides to creative ways to cook Primal and Keto recipes. Mark’s spent years putting it all on the line and sharing every step of his journey with his readers. More recently, the blog has explored Mark’s experimentation with a ketogenic diet as a way to obtain metabolic flexibility while also living Primally.

If you’d like to learn more about Mark, this site, the Primal Blueprint health philosophy, or the ketogenic diet, take a look at the following pages:


Who Is Mark Sisson?

Primal Blueprint 101

The MDA Ultimate Guide to the Keto Diet


To get started, pick the category most relevant to you today. Choose from Diet & Nutrition, Fitness, Weight Loss, Primal Lifestyle, or Personal Improvement. Then see which blog post jumps out at you first.

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Mark Sisson Primal Kitchen Products

Before you go, check out our recipes page for some delicious, easy-to-make primal-approved breakfast, lunch, dinner, and snack delights.

What started as a grassroots Primal/Paleo health blog has grown into a progressive, revolutionary (dare we say it?) empire made up of health and wellness champions determined to live their best lives ever, spreading health-conscious advocacy wherever their bare feet may land. We’re deeply thankful for how our readers make Mark’s Daily Apple such a hit. And we hope you’ll join our movement if you haven’t already!



Mark’s Daily Apple is unique in that it’s not merely a hub of health and fitness information—although we do have all the education you could desire built into this site—it’s also an amazing dynamic virtual community, and that’s all thanks to our awesome readers. Just browse the dozens (sometimes hundreds) of comments that follow each daily post, the Mark’s Daily Apple Facebook Group, or the mind-blowing Success Stories, and you’ll see that the most gratifying aspect of our journey together is being part of the authentic, tight-knit community of real people that gather at MDA. We hope you’ll join us!

While this site is dedicated to ancestral health principles, there’s something for everyone, regardless of diet and fitness philosophy, because the Primal Blueprint and Mark’s take on the ketogenic diet is all about eating real, unadulterated foods that enhance optimal gene expression, engaging in functional and playful fitness that builds lean muscle and maintains ideal body composition, and practicing supportive lifestyle habits that foster stress-free, joyful living.

Much of the Mark’s Daily Apple audience has been reading the blog for three years or more. These readers have come to know and trust Mark’s advice about all things Primal, Paleo, Keto, nutrition, fitness, and weight loss, and appreciate not only the hours of time spent citing and analyzing primary sources and research published in peer-reviewed academic and medical journals in the articles, but also the unique way Mark educates in a logical, thorough, and sensible style.

Here’s what some of our longtime readers said about Mark’s Daily Apple in a recent survey:

“I go to MDA as my first port-of-call for info now, because I know I will find a balanced view. I trust Mark to wade through all of the info for me, weigh up the contradictory evidence, and give me the low down. As a long-time reader, I have read (and reread) many of the posts about the fundamentals of a Primal lifestyle. These days I mostly like articles addressing the latest nutrition study all over the news.”

“I appreciate Mark’s perspective and point of view. Unlike a lot of other keto and paleo vocal points, he is not an extremist and approaches topics with a no nonsense point of view.”

“I’m drawn to Mark’s authenticity, all the things I’ve learned here, the support/inspiration I feel from reading here even though I am not Paleo, the amount of research Mark supports his writing with.”

“Mark is freaking smart, and simplifies the best of the best. He saves me time seeking out info and brings me the latest trending topics.”

“I appreciate Mark’s take on EVERYTHING. I completely trust Mark’s judgment, not trendy but solid. It always helps me to get his take on things before rendering my own judgment on the subject.”

Mark Sisson

If you’re a longtime fan of Mark’s Daily Apple, thank you for your continued support. If you’re new to the blog, welcome. We’re serious about drilling down to discover the truth about the foods, exercise, sleep, stress management, daily movement, habits, and more can help us all live more awesome lives, but we try not to take ourselves too seriously. Life is an experiment and a journey, after all, and we’re all here together. Grok on, friends!

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