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: Diet & Nutrition

Dear Mark: Transdermal Magnesium and Vitamin D/B12 Products for a Vegetarian

For today’s edition of Dear Mark, I’m answering two questions. The first one concerns transdermal magnesium. Does it work? Can magnesium actually permeate the skin and enter circulation? Probably. And for the last question, I provide a bunch of examples of natural products—foods and behaviors—that can increase vitamin D and B12 levels for an ailing vegetarian.

Let’s go:

Mark, what’s your two cents on transdermal magnesium? I take between 200-600 mg mag glyconate daily. I then add mag chloride via ‘magnesium oil’ to my shoulders and anywhere my muscles are tighter than usual. Anyone else use the mag oil or gel?

I like it.

If you rely solely on the scientific literature, there isn’t a ton of strong evidence. But there is evidence.

In one study (PDF), subjects took daily 12-minute epsom salt (containing magnesium sulfate) baths for a week straight. After a week, magnesium levels had risen significantly in most subjects. Those who’d already had replete magnesium levels saw their urinary excretion increase, suggesting that excess magnesium does get absorbed but not retained. Epsom salt baths also provide bioavailable sulfate, a hugely important but underappreciated mineral in our physiology.

Read More

Eating Insects: No Longer a Fringe Choice

Three years ago, my pal Gabi Lewis—founder of Exo, who make the best cricket protein bars on the planet—made a compelling case for eating more insects. Today, I’ll build on these arguments and, based on new evidence, offer even more reasons you should consider incorporating edible insects into your diet.

Though few people reading this consider insects anything but a novelty, for many human cultures they were (and are) staple foods. Humans have been eating insects for millions of years, starting with our distant ancestors and continuing through the present day.

Read More

10 Nutrient Optimizing Tips for the Primal Enthusiast

You’re reading a blog about nutrition. You’re clicking links to scientific studies and abstracts. You’re in deep. You obviously care about the quality of the food you eat and the effect it has on your health.

But you also know that perfect is a myth. We can’t achieve it, and if we think we can and spend all our time obsessing over perfection, we usually subvert our own goals. Perfection becomes the enemy. But better is always within reach, and today I’m going to give you a few ways to improve your nutrient intake and make your food healthier and safer. Who’s in?

Read More

Dear Mark: Social Contact and Neuroplasticity; Extra Protein and Muscle Gain

As you all know, one of my favorite parts of doing this blog is the constant, unyielding, uncompromising feedback I get from readers. When I make a mistake, or overlook a crucial piece of a puzzle, someone tells me where I went wrong or provides that missing piece. For today’s edition of Dear Mark, I’ll be addressing two emails from readers who took me to task for things I missed on this week’s posts.

The first comes from Simon, who had a great suggestion for increasing neuroplasticity. The second comes from Jen, who highlighted a new study shedding light on the effect of extra protein on muscle gains.

Let’s go:

Read More

Should You Eat Less Protein?

Over the past several years, I’ve noticed a subtle shift in the way the media discusses dietary protein, with many experts promoting lower intakes. The push for lower intakes hasn’t only come from the mainstream crowing about red meat and colon cancer. Many voices from the alternative health communities are urging a reduction in protein. Even the ancestral health community counts among its ranks protein skeptics.

Am I one? I’m not sure. In past posts, I’ve discussed how my own tastes have changed, going from eating high protein to more moderate amounts.

Today I’m addressing the standard arguments levied against high protein intakes. Hopefully, we can get to the bottom of the issue.

Read More

Dear Mark: How Often Should I Supplement with Turmeric?

For today’s edition of Dear Mark, I’m talking about turmeric. Last week, I made an off-handed recommendation that people not eat high doses of turmeric, prompting a great question in the comments. Are there actual dangers to turmeric consumption? Is there something you folks should know? Does something perilous lurk within that yellow powder in your cupboard?

Not exactly, but I did make that recommendation for a reason. Let’s find out why:

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!