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...

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Category: Fats

Dear Mark: Potato Diet, Lean Gains, EVOO/Butter/Ghee, Exogenous Ketones, and Early IFing

For today’s edition of Dear Mark, I’m answering several questions drawn from the comment board of last week’s post on fasting vs carb restriction. First, how do I square my recommendations with the successful reports of potato dieters losing weight on a high-carb tuber diet? Second, is Leangains optimal for mass gain? Third, how do I use extra virgin olive oil, butter, and ghee? Fourth, could exogenous ketones help a man with dementia, MS, and seizures? Fifth, how should a woman with stalled weight loss integrate fasting?

Let’s go:

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Supplements For Brain Health: What Nutrients and Supplemental Foods Make the Most Difference

As humans, our most important bodily endowment isn’t our claws, sharp teeth, powerful haunches, iron grips, prehensile tails, venomous secretions, or aerosolized musk. It’s the brain. We use it to shape the world around us, to bend physical reality to our will, to manipulate matter and create powerful technological terrors. These days, the human brain is more important than ever. If you want to enjoy life, pursue and succeed at your passions, to conquer your little corner of reality—you need a healthy brain. Brain health is key to total health—and quality of life.

By some analysis at least, however, neurogenerative diseases remain on the rise and take an ever more extreme emotional and economic toll. So, how do we keep our brain health intact? While much of it comes down to doing the things that keep your brain healthy and avoiding the things that harm it—exercising instead of sitting on the couch, breathing exclusively fresh air instead of tobacco smoke, sleeping instead of staying up—another big variable is the food we eat.

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Dear Mark: Saturated Fat More Harmful to Liver Than Sugar?

For today’s Dear Mark, I’m answering just one question from a reader. What are we to make of the new study purporting to show that saturated fat is the most harmful substance a liver can encounter? Should we remove all traces of it from our diets? Should we eat pure sugar? Quaff soybean oil? How relevant is an overfeeding study to a community of people dedicated to eating a sustainable, weight-reducing or -maintaining diet that includes saturated fat?

Let’s find out:

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Can a Vegan Go Keto?

Absolutely! Anyone can go keto, including vegans. They might not be able to stay vegan, but they can certainly go keto. Nothing stopping them. The more the merrier.

Jokes aside. Can someone go keto while remaining vegan?

That’s a tougher problem. Not intractable. But real tough.

Why is it so hard?

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Periodizing Nutrition: The High Fat Approach

I’m excited to introduce a guest post from an elite athlete in the midst of an incredible ultrarunning career. Believe me, not many athletes can write—or do much of anything except perform and veg out on the couch recovering before the next workout. Zach Bitter, record setting ultramarathon runner, is different, as readers of his popular blog already know. Zach holds the American record for the 100-mile run of 11 hours, 47 minutes. That’s running all day—400 laps around a regulation track—at seven-minute per mile pace. Go try to run a single mile in seven minutes to gain a full appreciation for his supreme effort.

Zach has achieved some notoriety in the ultra scene as a dedicated fat-fueled athlete. (You can read his story here.) He dabbles in keto during his base building training cycles, believing that it speeds recovery and reduces the stress impact of his workouts. His fueling strategy for competition is more nuanced, and he has a lot of important things to say on the matter. His post offers insightful commentary about periodization of nutrition. Here is a quick sound bite from Zach about his big picture goals with becoming highly fat- and keto-adapted: “I strongly believe that the less you have to fuel during a race, the better.” Enjoy this message from Zach, and we hope to check in with him again in the future.

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Dear Mark: PUFA Confusion, Mushroom Coffee, Swiss Water Process, and Timing the Fast

For today’s edition of Dear Mark, I’m answering four questions from readers. First, should someone homozygous for the FADS variant that increases PUFA conversion eat less or more PUFA? Next, what’s the deal with all the mushroom coffees out on the market? Are they actually beneficial? Third, when looking for a healthy decaf coffee, what should you watch for? And finally, how should a breakfast skipper/intermittent faster deal with increased morning hunger caused by morning workouts?

Let’s find out:

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