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...

Tell Me More
Stay Connected

Tag: hormones

Why We Crave Comfort Foods

We all have them – ”comfort” foods that feel like more than just food. Far beyond the random edibles of our day, these are imbued with the likes of positive memories, celebratory identities, nurturing associations. They’re the feel-good recipes or psychological standbys that satiate us on a deeper level. Irrational as it might sound (but isn’t really), food is more than function. It’s more than taste or even nutrition (gasp!). Food, specifically our personal list of comforting favorites (resulting from cultural and emotional experience), has the power to shift our mood as well as our physiology.

When we go Primal, we end up rethinking our relationship with these old standbys. In some cases, we cherish the memory but let them go for the sake of health goals. We might experiment with adapting them, or we might simply reserve the right to enjoy them in their original forms on special occasions. However we re-envision our favorites post-Primal, I’d suggest we don’t need to throw out the concept of comfort food itself. Though the actual preferences are personal, the impact of comfort food as a whole is real – and measurable. Research has shown that eating – or even writing about – comfort food actually blunts negative emotions like loneliness. As with any phenomenon, the more we understand it, the better able we are to use it for good in our lives and health.

Read More

Dear Mark: Sleepy After Chicken, Microwaving Bone Broth, and Safest CAFO Meat

It’s time for yet another edition of Dear Mark, and this time I’m covering some interesting topics. First up is the phenomenon of sleepiness following a meal of chicken with the skin on. Far from being an unwelcome, foggy sort of fatigue, this particular brand of sleepiness is pleasing. Could it be something in the chicken? Next, I discuss whether or not the proteins in bone broth are irreparably alerted – in a bad way – upon microwave exposure. I don’t come to an ironclad conclusion, but I do try to give some perspective on the issue. Finally, I try to decide on the “safest” CAFO meat to order when you’re unable to procure grass-fed or pastured. Let’s go:

Read More

How to Get Fitter, Faster and Stronger with Quality Sleep

Ah, sleep. We all know how much we need it, mostly because when we don’t get enough, the world takes on a different, more negative hue. Lights seem brighter and sounds more vivid, and not in a good way. Perpetual fogginess clouds our thoughts, slurs our words, and prevents us from focusing on anything but the coffee pot timer. And then there’s the sleep deprivation research corroborating our experiences and explaining in lurid detail just how vital sleep is for our health. I’ve done my part in bringing this information to you, focusing for the most part on the metabolic health benefits of getting sufficient quality time with everyone’s sweet slumbery mistress. I’ve linked to articles discussing the links between poor sleep and ill liver health, disrupted metabolic function, and cancer. If you’re a regular reader of MDA, you’re probably aware of all this. Bad sleep can make you fat, sick, and prone to serious degenerative diseases.

Read More

Dear Mark: Obesogens, Tots Who Hate Veggies, and Pregnancy Recovery

For today’s edition of Dear Mark, I’ve got three topics for you. First are the obesogens, those endocrine-disrupting chemicals that permeate our environment, our foods, our consumer products, and even our bodies. They sound scary and terrible, but how much should we be worrying about them? Next up is the tot who hates his veggies, as classic a trope as any other. Should we be force feeding these kids broccoli, collard greens, and butternut squash at all costs? Or should we take a more laissez faire approach and let them develop their tastes on their own? Finally, I discuss the importance of proper pregnancy recovery, especially in regards to lifting heavy (and not so heavy but extremely wiggly) things.

Let’s go…

Read More

Dear Mark: Can’t Squat, Please Help; Plus, High CRP, No Symptoms, and Glutathione

In this week’s edition of “Dear Mark,” I answer two reader emails that end up being more like three questions. First, I try to help out Alex, who’s having trouble reaching full depth in the Grok squat without falling over backwards. This is a common issue, believe it or not, and luckily there are some pretty simple fixes that people can try. In my response, I explain why he might be toppling over and what he can do to fix it. After that, I answer a question about C-reactive protein, the “inflammation” marker. One reader is feeling great and sitting at an ideal body weight, but a recent blood test in which CRP was elevated has worried her. She wants to know what she can do about it, so I explain why it might be elevated, why it might not be an issue, why it might be one, and what she can do to boost glutathione, which her doctor recommended she increase.

Let’s go:

Read More

Boxers or Briefs?

Believe it or not, it’s a question I get fairly often: “Grok didn’t wear tighty-whities. Should I?”

From time to time, I like to have some fun and expand the scope of this blog beyond the regular topics. Health and wellness, after all, come down to far more than just diet and exercise (and sleep and sun and stress, for that matter). So I’ve written about everything from the benefits of squat toilets, going poo-less, and stand-up workstations to the dangers of excessive sitting, nighttime light exposure, and passive living. Today, I’m going to branch out again. Today, I’ll attempt to answer what sages, wise men, gurus, and guys sitting around in gym locker rooms could not: boxers or briefs (or nothing at all)? So fill your cup and let’s dig in.

Read More

Dear Mark: Does Eating a Low Carb Diet Cause Insulin Resistance?

Despite all the success you might have had with the Primal way of life, doubts can still nag at you. Maybe it’s something you read, or something someone said to you, or a disapproving glance or offhand comment from a person you otherwise respect, but it’s pretty common when you’re doing something, like giving up grains, avoiding processed food, or eating animal fat, that challenges deeply-and-widely held beliefs about health and wellness. It doesn’t really even matter that you’re losing weight or seem to be thriving; you may still have questions. That’s healthy and smart, and it’s totally natural.

Read More

Gender Differences in Fat Metabolism

A few months ago, I addressed the role gender plays in how we respond to intermittent fasting. That post sparked a great discussion, and I’ve since received a fair number of emails from readers eager to learn other ways in which gender plays a role in our health and nutrition. One email in particular set me off on a round of research. So, a hat tip to you, Winifred, for giving me something to think, learn, and write about. I hope everyone finds it to be helpful.

As you may know, women and men store and metabolize fat differently from each other, and a 2008 paper (PDF) reviewed the evolutionary reasons for these differences. Here’s a summary of their findings and few other noteworthy factoids:

Read More

Dear Mark: Coffee and Insulin, Fat and Post-Workout Meals

In today’s edition of Dear Mark, I cover two topics near and dear to many of your hearts. First, I discuss the interaction between coffee intake and insulin. Does coffee stimulate its secretion? Does it impair insulin’s function, or our body’s reaction to it? Find out how you should approach coffee on a Primal Blueprint eating plan. Then, I explore the suitability of dietary fat in the post-workout meal. Does it belong? Should you be stocking skim milk, de-fatted chicken breast, non-fat yogurt, and cartons of egg whites for your post-workout meals? If you’ve just lifted something heavy, should you therefore shun the yolks and fear the fat for the rest of the day? Find out below.

Let’s go.

Read More

Is Wheat Addictive?

Within the Primal/paleo community and elsewhere, it’s often stated offhandedly that wheat is addictive. And absolutely, wheat for many people feels like something they could never give up. I hear it all the time: “I couldn’t live without bread.” “What would I do without cereal, dinner rolls, toast, {insert your favorite grain-based food item here}.” And wheat is often the main culprit in the sugar/insulin rollercoaster that drives sugar-burners’ need to eat (more wheat) every few waking hours. But is wheat addictive in a different sense – as an opiate like heroin and other drugs? Today I take a look at the research and attempt to separate fact from fiction. What do we really know about wheat as an opiate? Let’s find out…

Read More

Join Over 300,000 Subscribers!

Signup and get:

Primal Blueprint Fitness plus 7 other eBooks
7-Day Course on Primal Fundamentals
Special Offers and More!