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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Tag: dear mark

Dear Mark: Are My Vibram FiveFingers Dangerous?

Today, I’m answering one hot-topic question for this week’s Dear Mark. It concerns an issue that’s inspired several dozen emails from readers: the Vibram FiveFingers lawsuit and settlement. If you want to skip ahead to the take home point, it’s that I’m not getting rid of my Vibram FiveFingers anytime soon. Heck, I’m wearing a pair as I type this. I may even be typing with my FiveFinger-clad toes. (It could happen…) If you want my more extensive take on it, read on.

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Dear Mark: Tweaking Sprints for a Stressful Life; Carrie’s Primal Transition

For today’s edition of Dear Mark, I answer one question and Carrie answers another. First up is one from Diane, a (full-time) working mother who’s noticed something interesting about her variable response to sprinting: when she’s relaxed and low-stress or on vacation, sprints lean her out; when she’s working and inundated with stress and responsibilities and concerns, sprints make her retain or even gain body fat. Since she realizes the power of sprinting and doesn’t want to give it up completely, Diane wants a few tips for hacking sprints on a high-stress lifestyle. Next, Carrie gives a quick overview of her transition into the Primal lifestyle and breaks down what Primal living looks like for her these days.

Let’s get into it:

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Dear Mark: IBS and Gluten, Tweaking Calories for Fat Loss

For today’s edition of Dear Mark, we’ve got a short but sweet two-parter. First up is the connection between Irritable Bowel Syndrome, gluten, coffee, and alcohol. A reader with a history of IBS triggered by gluten, coffee, and alcohol wonders if giving up gluten really could have solved his intolerances of the other foods. Then, I give my take on the best dietary strategy for losing the last few pounds of body fat for an otherwise lean individual. Believe it or not, I even mention and recommend counting calories.

Yep. Let’s go:

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Dear Mark: Why Hyperglycemia Is Bad and Those Stubborn Final Pounds

Today we’ve got a fairly short one with just two questions and answers. First, I tackle a big topic: the specific effects of hyperglycemia on the body. That hyperglycemia is bad for us is implicit, but it’s important to understand why it’s so dangerous. Today, I give a brief but detailed overview of the negative effects of chronic high blood sugar. Next, Carrie gives a female reader a few thoughts on how to (and whether to) lose the last few stubborn pounds. Her unique advice involves sprinting, reframing, rethinking, and restating.

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Dear Mark: Vegetable Powders, Pro/Prebiotic Timing, RS Questions, and Routine Eating

For today’s edition of Dear Mark, we’ve got four questions and four answers. First, I explain the merits and drawbacks of vegetable powders in the event of low produce availability. Next, I discuss whether there’s a perfect time to take your probiotics and prebiotics, or whether it doesn’t matter at all. After that, I answer a quick barrage of resistant starch-related questions, followed by a query regarding a monotonous eating regimen that by all accounts appears to be working very well. Is there a hidden danger in eating similar meals all the time?

Let’s go:

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Dear Mark: Liver for Babies, Flax Seed, and MCTs with Fruit

For today’s Dear Mark, I’ve got a three-parter. First I discuss the suitability and proper dosage of grass fed beef liver for babies and toddlers. It’s definitely a good choice, but you do have to keep a few parameters in mind to do it right and do it safely. Next, I discuss flax seed. Is it a good choice? Does it have health benefits beyond the meager conversion of alpha-linolenic acid into longer-chain omega-3s? Finally, I explore what happens when you eat medium chain triglycerides – the fats most prevalent in coconut oil – with fruit or other carb sources. Good, neutral, or certain death?

Let’s go:

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Dear Mark: Nausea After Fast Breaking, Thumbless Pushup Alternatives, Chewing, Sour Cherry Juice, Yacon Syrup, and Mid-Distance Running

For today’s Dear Mark, I’m answering a bunch of your questions rapid fire-style. First up, I discuss why a person might experience nausea after breaking a 24 hour fast with a meal. Second, I explore some pushup alternatives for a guy with terrible thumb arthritis. Third, I explain the importance of chewing for jaw development, dental health, and digestion, and for the last three, I give my take on sour cherry juice as a health supplement, yacon syrup as a Primal sweetener, and middle distance running as an acceptable form of exercise.

Let’s go:

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Dear Mark: Aloe Vera for Leaky Gut, One Meal a Day, and Glyphosate and Celiac Disease

For today’s edition of Dear Mark, we’ve got a three-parter. First I discuss the effect of aloe vera on gut function. Is there evidence that it’s a panacea for intestinal permeability, as so often is claimed? Next, I help an extremely active reader who’s considering switching to one meal a day to lose the last few stubborn pounds of body fat figure out what his next move should be. And finally, I explore the evidence for a connection between the herbicide glyphosate and celiac disease.

Let’s go:

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Dear Mark: Is a High Protein Diet Really As Bad for You As Smoking?

It’s about that time, boys and girls. A new “protein kills” study has arrived to throw you into the pit of existential angst and self-doubt you recently managed to crawl out of from the last one. As you may know, I’ve just spent a week in Tulum, Mexico for PrimalCon (which was amazing, by the way, absolutely fantastic) where I managed to avoid most contact with my inbox. Oh, I took a couple glimpses here and there, enough to notice an endless stream of frenzied email subject lines, but I didn’t read the contents until the flight home. I still knew what was coming.

I finally have a little time to dig into this paper (which actually covers two studies) to see if there’s anything we can learn. Let’s jump right in…

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Dear Mark: Palmitic Acid and Eating Speed

For today’s edition of Dear Mark, I’m discussing the seemingly evil qualities of palmitic acid, the preferred storage form of body fat in humans and many other mammals. Studies seem to indicate that pure palmitic acid has negative health effects, so should we be avoiding palmitic acid-containing foods like butter, meat, or palm oil? Then, I explain the health effects of eating really fast. As you’ll see, there are quite a few reasons to eat more slowly than quickly. I also include a few tips for fast eaters who want to slow down.

Let’s go:

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