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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Category: Self-Experimentation

Dairy Intolerance: What It Is and How to Determine If You Have It

I often say that “dairy is fine and even healthy if you tolerate it.” But what exactly does that mean? How do you know if it’s “not okay”? You could be reacting poorly to the lactose, the casein, the whey, or all of it. You could just ditch all dairy forever more and be perfectly fine – but you shouldn’t eliminate a food group, especially one as delicious, nutrient-dense, and potentially rewarding as dairy, unless you absolutely must. Plus, it’s just good to know what you can and cannot tolerate. You don’t want to tiptoe through life, scared of food because you’ve never taken the time to determine your ability to tolerate it. You want to be empowered with knowledge and venture forth boldly – or carefully, if caution is warranted – through the cheese aisle.

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When Listening to Your Body Doesn’t Work – Part 2

As I wrote last week, we can’t always trust what our bodies are telling us to do. Our bodies send us a lot of other confusing and even misleading signals – but they don’t always pertain to food. Any of our base physiological processes will manifest as messages, cravings, and desires. That’s how the body gets us to perform tasks (like eating because of hunger, drinking because of thirst, and sleeping because of drowsiness), by creating physiologically-driven desires and motivations. In theory, these motivations match up with what’s best for us in that given situation and improve our chances of survival. Our bodies mean well. When they tell us to do or not to do something, they’re doing their best with the available information. If you place yourself in an evolutionary novel environment, your body is going to interpret the situation as best it can. When it perceives a high stress office environment with free coffee on hand, or a world where doing nothing is a viable mode of subsistence, or the aforementioned bright lights in the dead of night, things get complicated and the signals can get a little screwy. Read on to find out how this can all play out.

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Top 10 Reasons to Order The Primal Blueprint 90-Day Journal

Update: The 90-Day Journal is still available at PrimalBlueprint.com, but the special limited-time offer has come to end.

Last week, I unveiled The Primal Blueprint 90-Day Journal, complete with exclusive freebies, enticements, and coupons. Many thanks to each person that has already ordered a copy. I hope and anticipate this book will help you discover new insights into how your body responds to certain foods, workouts and other lifestyle behaviors, and that through self-experimentation you will be able to markedly improve your health. I can hardly wait to hear reports back from those that use the 90-Day Journal. I’ll be publishing them here on MDA, so check back in months to come as results begin trickling in.

If you missed last week’s announcement or have been on the fence about picking up a copy, here are the top 10 reasons to grab one in the next 24 hours before the special offer ends.

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Dear Mark: Personalizing the Primal Blueprint

Primal life is good. You’ve lost some weight, improved some health markers, enjoy steady even energy throughout the day, and you finally look forward to exercise (and movement in general) for the first time in a long while. You love the food, and the compliments you’ve started receiving since beginning to eat it, and you’re generally content, but something’s missing. It’s not that you aren’t satisfied; it’s that you’re curious about what else you can tweak to make your body work a little differently. You want to see what makes your body tick, and why, down to the very last detail. I get that.

Luckily for you, your experience and the resources in this community give you the necessary wherewithal to find out. Let’s go to the question that prompted this post, shall we?

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How to Conduct a Personal Experiment: Yellow Light Exposure (plus an Announcement)

You guys ready for another personal experiment? I hope so. Even if don’t think you’re ready to take something on, I’m confident you’ll be able to handle this one, because it’s relatively simple, intuitive, and easy. It’s also something I’ve been discussing for a couple years now, so you’re most likely familiar and comfortable with the concept. But most importantly, today’s experiment is a gentle one that requires very little commitment. No jumping in freezing cold water, no drastic changes to your sleeping schedule. All I’m asking you to do is experiment with nighttime yellow light exposure.

Huh?

Remember how I wrote about nighttime exposure to blue light affecting melatonin secretion and, subsequently, sleep quality and duration way back when? Yeah, that. In case you didn’t read it, I’ll give a quick explanation:

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How to Conduct a Personal Experiment: Biphasic Sleeping

It’s time for another edition of “How to Conduct a Personal Experiment.” Last week, it was the cold water plunge. Today, we’re going to talk about running a biphasic sleep experiment. First, though, I’d like to know: how are the cold plunges going? Are they, well, cold? More importantly, did you have any difficulties setting up the experiment, identifying variables, and choosing what to measure and track? This whole personal experiment stuff is likely new to most of you, and while there’s no real “wrong” way to go about it, there will be some initial difficulties. Be sure to keep us posted in the comment section.

Okay, on to the new experiment.

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