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

Category: Primal Lifestyle

Testosterone Supplementation: My Primal Take

After I turned 60, a routine checkup showed that I had lower-than-normal free testosterone levels. I hadn’t noticed anything that would have alerted me. No symptoms. No indication. Everything worked well. But it nagged at me. I knew testosterone did much more for a man’s health than just “build muscle”—which I had no real interest in at this point—so I decided to explore TRT, or testosterone replacement therapy.

I did a careful survey of the literature, coming away pleasantly surprised. The evidence was almost uniformly in favor, with the well-constructed studies showing major benefits for TRT. This is TRT, mind you. Not “juicing,” not steroid abuse. Restoration of biologically-appropriate levels of testosterone. Thus began my experiment….

Read More

Two Final (and Favorite) Adaptogens: Rhodiola Rosea and Bacopa Monnieri

I’ve taken up the subject of adaptogens over the last several weeks, and today I’m wrapping it up with two of my favorites: Rhodiola rosea and Bacopa monnieri.

Primal aficionados from way back will know that I’m a big fan of Rhodiola rosea. It’s an integral component of one of the original Primal Blueprint supplements, Primal Calm. It’s a formula I put together for my own needs and eventually decided to offer in the supplement line. (That seems to be how I come up with things, I suppose….) I’ve written in the past about stress being one of the issues I’m still working on in my Primal life, and adaptogens have been a useful tool I’ve employed. Living with an ancestral template doesn’t preclude being scientifically resourceful. 

But let’s dig into these final two players….

Read More

Dear Mark: Why are Male Fertility and Testosterone Levels so Low?

For today’s edition of Dear Mark, I’m answering just one question. But it’s a good (well, maybe not good, but certainly important) one: Why is male fertility on the rise and testosterone on the wane? The popular notion is that women flushing birth control pills and peeing estrogen-rich urine into the public water supply are the primary reasons for the sex hormone issues facing men, but I’m not so sure. Let’s explore what else might be causing the problem.

Read More

Dear Mark: Collagen Peptides, Fasting vs Sleeping, Dog Bone Broth, and Pork Broth

For today’s edition of Dear Mark, I’m answering four question. First, are collagen peptides just as effective as bone broth or other collagen sources? Second, how should I choose between IFing or sleeping like a baby using pre-bedtime nutrients that may impede autophagy? Next, I explore whether you should be making dog bone broth (it’s not what you think, so don’t worry about that). And finally, what are some of my favorite pork bone broth recipes?

Let’s go:

Read More

5 Non-Dietary Factors That Influence Your Microbiome

The microorganisms that reside in, on, and around our bodies influence almost every facet of our well-being. Part of maintaining microbiome health is maintaining homeostasis. Another is supporting diversity.

Our goal, then, is to improve our microbiological real estate in the many areas of the body that commensal and symbiotic bacterial like to put down roots—the gut, mouth, lungs, skin, reproductive organs, and so on. The average Primal enthusiast is well-versed with the role of food choices and smart supplementation (although research is always uncovering new wrinkles—more on this to come). 

I thought I’d give a little attention to some of the other basic practices that can influence microbial diversity and homeostasis. There are more answers and nuances than I can cover today, but let’s start with some of the fundamentals.

Read More

Dear Mark: When Nature is Stressful and How to Use Fish Sauce

For today’s edition of Dear Mark, I’m answering a couple questions from readers. First, is nature always relaxing and blissful? Or are there instances where being in nature is far more stressful than being indoors? Why, and what should we do about it? Second, how do I use fish sauce, and how would a parent use fish sauce to get picky kids to try (and like) new foods?

Let’s go:

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!