The popular story of how low-carb diets work goes something like this: Reducing your carbohydrate in...
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
One of the most common questions I get is “Does [x] break a fast?”
What they’re really inquiring about is: “Does this interfere with, negate, or nullify the benefits of fasting?”
These benefits include:
Ketosis: Fasting is the quickest way to get into ketosis, an metabolic state characterized by increasing fat burning, fat adaptation, and—in some people—improved cognitive function.
Fat Loss: When you’re fasting, you’re not eating, and not eating is the best way to force your body to burn the fat it already possesses. Fasting also means no additional calories are coming in, and many people find that fasting is a great way to control their calorie intake.
Autophagy: Autophagy, or “self-eating,” is the process by which our cells prune damaged components, maintain proper function, and keep aging at bay. Fasting triggers autophagy. Breaking the fast will stop autophagy.
Let’s go through the most popular queries one by one and figure out how each one affects an intermittent fast. (For questions about what supplements break a fast, check out my post, “What Breaks a Fast: Supplements Edition.”)Read More
Biological systems are self-maintaining. They have to be. We don’t have maintenance workers, mechanics, troubleshooters that can “take a look inside” and make sure everything’s running smoothly. Doctors perform a kind of biological maintenance, but even they are working blind from the outside.
No, for life to sustain itself, it has to perform automatic maintenance work on its cells, tissues, organs, and biological processes. One of the most important types of biological maintenance is a process called autophagy.
Autophagy: the word comes from the Greek for “self-eating,” and that’s a very accurate description: Autophagy is when a cell consumes the parts of itself that are damaged or malfunctioning. Lysosomes—members of the innate immune system that also degrade pathogens—degrade the damaged cellular material, making it available for energy and other metabolites. It’s cellular pruning, and it’s an important part of staving off the worst parts of the aging process.Read More
Metabolic flexibility is the capacity to match fuel oxidation to fuel availability—or switch between burning carbs and burning fat. Someone with great metabolic flexibility can burn carbs when they eat them. They can burn fat when they eat it (or when they don’t eat at all). They can switch between carbohydrate metabolism and fat metabolism with relative ease. All those people who can “eat whatever they want” most likely have excellent metabolic flexibility. So, why does it really matter, and how does it happen? Let’s get into the weeds today.Read More
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
Ah, chocolate. What a life.
According to the Aztecs, the great feathered serpent god of wisdom and creation known as Quetzalcoatl introduced the cocoa bean to mankind. It’s likelier that it originated in the Amazon rainforest and wound its way north to Mesoamerica, whose inhabitants figured out they could domesticate, ferment, roast, crush, and mix cocoa with water, chilies, and spices to produce a bitter, intoxicating drink. It then took a boat across the Atlantic, learning Spanish along the way. Europe wasn’t sure what to make of the bitterness until someone spilled a little sugar into the drink. Cocoa quickly swept across the continent, giving rise to large corporations that persist to this day, like Cadbury, Nestle, Hershey, and Lindt.Read More
The main objective of following the Primal Blueprint is to extract the healthiest, happiest, longest and most productive life possible from our bodies – and to look and feel good in the process.
Our 10,000-year-old Primal genes expect us to emulate the way our ancestors ate and moved; and the Primal Blueprint says we should do exactly as they expect. While there are many things we can do (or eat) today that very closely approximate what Grok did to trigger positive gene expression, there are also a number of obstacles that can thwart our attempts to be as Primal as possible. Artificial light prompts us to stay up too late and sleep too little. Electronic entertainment competes for our time when we should be out walking and basking in sunlight. We don’t always have access to ideal foods. We shower too much in water that’s too hot. We use medicines to mask our symptoms instead of allowing our bodies to deal directly with the problem. You get my point. You can’t go back to the paleolithic.
One of my tasks is to find the shortcuts—the easy ways to get the same genetic expression benefits Grok got—but by using 21st century technology or just plain old common sense. Working out in Vibram Fivefingers to simulate going barefoot is an example. Or learning how to spend time in the sun without sunscreen AND without burning. Getting more from a 20-minute full-body exercise routine than from a 3-hour cardio workout is yet another example. And given the lack of certain critical nutrients in even the healthiest diets, finding the best supplements is another.
Here are a few of the best categories of supplements I can recommend to just about everyone:Read More
I’ve been writing about bone broth for a long time. I’ve been drinking it even longer. I’m not sure you can get anything much more primal than a heap of bones cooked for hours into rich, gelatinous glory. Ritual and taste aside, however, I count quality bone broth as an important supplemental food. The copious health benefits are simply too substantial to pass up.
Some of you, I know, are bone broth fans—a few even connoisseurs. You’ve been making your own for decades, maybe with recipes you learned in your grandparents’ kitchen. But what does the average Primal type need to know about bone broth? What goes into making it? What are the distinct health advantages? Are there risks or downsides? What are the alternatives? Finally, what about some recipes? I’m glad you asked….Read More
Feeding infants is quite simple. There’s a ton riding on you getting it right, of course—a developing immune system, the fact that the kid’s growing an inch a week, a permeable blood-brain barrier, synaptic pruning—but the answer is usually always “feed them more breastmilk.” Even if you can’t nurse, you’ve got formula, which, for all its limitations, is a decent proxy for breastmilk and getting better all the time. Feeding children, however, is a different ballgame altogether.
I’ve gotten a lot of requests for a post about children’s nutrition, so it’s long overdue. When it comes down to brass tacks, kids really are just small people. They aren’t a different species. They use the same nutrients their parents do. They need protein, fat, and glucose just like us. So in that sense, feeding kids is simple: Give them all the nutritious foods you already eat and know to be healthy.
But it’s not easy.Read More
I use my Los Angeles surroundings as a barometer for changes in the mainstream approach to health, and it holds up quite well. Silicon Valley can claim to be the cradle of technology, but L.A. is definitely the cradle of diet and fitness trends; and the latest is most definitely keto. At the local cafe where every species of Malibu fitness enthusiast gathers to gossip and fuel up, I’m seeing fewer gels and energy bars, and way more butter coffees and discarded packets of the new powdered ketone supplement products.Read More
For years, wine was my stress reliever at the end of a long day. Having given up grains and grain-based beverages over a decade ago, I swapped beer for wine. It was my frequent dinner companion. Grilled grass-fed ribeye wasn’t grilled grass-fed ribeye without a glass of California Cab. And then I suspected my 1-2 glass a night habit was impairing my gut health and affecting my sleep. I ran a quick experiment, determined that the nightly wine indeed was having bad effects, and stopped drinking altogether.
It worked. My gut health and sleep improved. Yet I still missed wine. I missed pitting the crunch of an aged Gouda’s tyrosine crystals against a big red, lingering over a glass with an old friend, clinking glasses, giving toasts. I missed what Hemingway called “one of the most civilized things in the world and one of the most natural things in the world that has been brought to the greatest perfection.” But I didn’t miss the poor sleep and gut disturbances.Read More