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: toxins

Dear Mark: How Does LDL Even Penetrate the Arteries, New Zealand Farmed Salmon, Elevated Ferritin

For today’s edition of Dear Mark, I’m answering three questions. First, can LDL actually infiltrate the arteries, or is there more to the story? Malcolm Kendrick says there’s more to the story, so I dig into some literature to see if they corroborate his position. Second, is New Zealand farmed salmon good to eat? And finally, what should you do about elevated ferritin levels—and why else might they be elevated if not because of your iron?

Let’s go:

Read More

How Does Alcohol Affect a Workout?

Winter is here. It’s cold outside—often cold and snowy and/or rainy enough to dissuade most people from extensive outdoor activities—and extremely warm indoors. Families are getting together, companies are throwing holiday parties, we’re eating, drinking and merry-making. Alcohol is everywhere, and many of us will be drinking more than we usually do. In fact, this time of year presides over a sharp spike in alcohol consumption.

What’s it mean for your workout?

After looking at the research, at first glance, I’m going to be honest with you: It doesn’t sound good.

Read More

Dear Mark: Air-Frying, “Primal” Vegan-ish, Perfect Heath Diet, and Bad Rep or Rap

For today’s edition of Dear Mark, I’m answering four questions. First, is air-frying gentler than deep-frying? Does it produce less acrylamide? Second, what do I think of a reader’s Primal-style plant-based way of eating? It’s actually quite good. Third, why didn’t I mention the Perfect Health Diet in last week’s post on top trending diets? And last, did I make a typo or grammatical error when I wrote “bad rap”?

Let’s find out:

Read More

8 Dietary Truths We Wish We Could Tell Non-Primal Types

Longtime readers of the blog are so inundated with the latest dietary research and results from years of personal experimentation that they often take the simple, basic dietary truths for granted. But it’s the simple ones that make the most difference. Today I’m going to sift through the knowledge base to winnow out the dietary truths that, while basic, fundamental, and important, are unknown or misinterpreted in the “normal population.” If you think someone you know or care about could learn from this list, send it along.

What follows are some basic dietary truths that everyone needs to understand.

Read More

A Definitive Guide To Tea

Today’s guest post and recipe are offered up by Simon Cheng, founder & CEO of Pique – Tea Crystals. I connected with Simon and his team about a year ago and have been a fan of their tea products since. In fact, it’s what you’ll find in my kitchen cabinets these days (the basic English Breakfast is what I drink most often). The following is an excerpt from Pique Tea’s Definitive Guide to Tea ebook, which I highly recommend. You can download the full version HERE. Enjoy!

Tea has now become one of the most studied superfoods in the world, with mounting evidence for a seemingly unending number of health benefits. Importantly, these health benefits have been observed in large numbers of people (entire populations) who have consumed tea for long periods (decades).

Read More

After Whole30 or Other Reset: 11 Tips for Reintroducing Allergenic Foods

So, you’ve done a Whole 30® (or other dietary reset involving the removal of potentially allergenic or sensitizing foods to establish homeostasis). It’s over. It went well. You feel good. You’re ready to take on the world. Now what?

Officially, you’re supposed to reintroduce the allergenic foods you removed, one at a time, to see how they affect your digestive, psychological, metabolic, and overall health. After all, the main point of the Whole 30 is to uncover the allergenic foods that actually bother you and the ones that don’t. A broad, diverse diet is awesome if you tolerate it, and having more foods available to eat makes living easier and more enjoyable. There’s no reason not to eat legumes (or dairy, or a glass of wine) if you like them and they don’t negatively affect your health.  The reintroduction phase of the Whole 30 simply helps you learn which of those foods work and which don’t. That said, it’s intimidating for a lot of folks….

Read More

What Can Heat Do For Your Health?

A few months ago, I explored the benefits and applications of cold therapy. Today, I’m going to talk about the benefits and applications of heat therapy—one of the most ubiquitous and ancestral therapies in the history of humankind. You name a culture and—as long as they didn’t live in perpetual tropical heat—they probably had some form of heat therapy. Native Americans had the sweat lodge, those of Central America the temazcal. The Romans had the thermae, which they picked up and refined from the Greeks. Other famous traditions include Finnish saunas, Russian banyas, Turkish hammams, Japanese sentó (or the natural spring-fed onsen), and the Korean jjimjilbang. People really like the heat.

Read More

10 Primal Skin Care Ideas

Morning, everyone. Hope you all enjoyed a happy and safe holiday. I’m turning over the reins to one of our Worker Bees today as I spend some time on a book project (more to come on that). I know many of you have asked about natural skin care ideas in the comment board, and we’ve got some great suggestions today. I hope you’ll welcome our Worker Bee to the fold (she just joined us recently) and offer up your own ideas below. (And for those who may have missed it, I shared several of my own favorites last spring.) Have a good end to the week. 

Spend any amount of time perusing the shelves at your local supermarket or beauty supply store and you may notice that all the skin care products have something in common: a long ingredient list. I’m afraid to say most commercially-packaged bottles, jars, and tubes contain potentially harmful ingredients in the form of preservatives, stabilizers, artificial colors, and/or added fragrances, which could have negative long-term health effects when absorbed through the skin.

Read More

The Carnivore Diet: Pros, Cons, and Suggestions

All-meat diets are growing in popularity. There are the cryptocurrency carnivores. There’s the daughter of the ascendant Jordan B. Peterson, Mikhaila Peterson, who’s using a carnivorous diet to stave off a severe autoimmune disease that almost killed her as a child. The most prominent carnivore these days, Dr. Shawn Baker (who appears to eat only grilled ribeyes (at home) and burger patties (on the go), recently appeared on the Joe Rogan Experience and Robb Wolf’s podcast, and is always breaking world records on the rower. Tons of other folks are eating steak and little else—and loving it. There are Facebook groups and subreddits and Twitter subcultures devoted to carnivorous dieting.

What do I think?

Read More

The (Maybe Not So) Definitive Guide to Cold Therapy

Cold is really catching these days. Aubrey Marcus, whom I recently filmed a nice podcast with, was asked about his winning daily behaviors on another show. The very first thing he mentioned was “exposure to cold.” His practice is finishing his morning shower with a three-minute stint at full cold setting. He mentioned the hormonal benefits but also the mental edge he gets from psyching up and accepting the challenge instead of wimping out. He also cited research that people who engage in therapeutic cold exposure catch fewer upper respiratory infections. Hence, like many other elements of conventional wisdom, the old wives tale is backwards. Of course, we are talking about acute and optimal duration cold exposure, not prolonged exposure to elements that weaken your resistance and contribute to immune disturbances.

As with keto, there’s much more to be learned in this burgeoning field before we can operate in definitive (hence today’s title). Today, however, I’ll expose you (the first of more double entendrés to be on the lookout for) to important concepts and best practices so that you may enjoy the vaunted benefits and avoid some of the negative effects of going about cold exposure wrong.

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!