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: body fat

Dear Mark: Seaweed Supplements, BMI and Mortality, and Sleep Versus Exercise

In today’s Dear Mark I discuss my favorite seaweed supplement, kelp granules, which aren’t really a supplement in the classic sense, but more of a food that you can treat as a supplement. Next, I give my thoughts on the latest study to suggest that an overweight BMI confers the lowest mortality risk in people. Finally, I handle a question from a parent currently trying to juggle sleep with exercise who wonders which to choose. It’s a tough question, to be sure, but I give my best attempt at a helpful, realistic answer.

Let’s get to it:

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Gender Differences in Fat Metabolism

A few months ago, I addressed the role gender plays in how we respond to intermittent fasting. That post sparked a great discussion, and I’ve since received a fair number of emails from readers eager to learn other ways in which gender plays a role in our health and nutrition. One email in particular set me off on a round of research. So, a hat tip to you, Winifred, for giving me something to think, learn, and write about. I hope everyone finds it to be helpful.

As you may know, women and men store and metabolize fat differently from each other, and a 2008 paper (PDF) reviewed the evolutionary reasons for these differences. Here’s a summary of their findings and few other noteworthy factoids:

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A Primal Primer: Brown Adipose Tissue

Last week’s Dear Mark discussing cold thermogenesis got some of you asking about brown adipose tissue. It’s a topic that deserves a full-fledged Primal Primer, especially since the idea of “good” body fat, a term many use to describe brown adipose tissue (BAT), is a foreign one. I mean, we’re talking about body fat here. Who wants it? Everyone I know is trying to get rid of their adipose tissue, not obtain more. It’s what brings many to this blog and what initiates this grand journey toward health and wellness. Even the people who say they “don’t care” about how they look would rather not have excess body fat, if only because it’s a marker of poor health or hormonal disregulation. We might acknowledge that we technically “need” some body fat to survive, but most of us will pass on any more than is absolutely necessary, thank you very much.

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Dear Mark: Leptin Resets, Cold Thermogenesis, and Safe Starches?

Before we get to the topics du jour I’d like to express my appreciation to everyone that participated in last week’s “Dear Readers” comment board. As I said, Mark’s Daily Apple, my books, and what I do is constantly informed by your thoughts and ideas. In other words, I couldn’t do this without you, so thank you for your feedback.

My team and I have compiled all of your ideas and have begun laying out a plan to give you what you want, and to reach the largest number of people possible. We’ll be checking things off the list in coming months, so stay tuned! Now on to today’s article…

From cruise ships to tweets to ice baths to supposedly hacked social media accounts, Dr. Jack Kruse the man is nothing if not controversial. But what about his ideas – do they have any merit? That’s what many of my readers have been wondering, along with how I feel about them. I’ve remained pretty silent on this matter, because Jack was doing his thing and apparently helping a lot of people in the process. I was doing mine and helping people in my own way. And all was well. Now, though, the questions are coming in droves, and I can’t really ignore them any longer.

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Dear Mark: Marathon Fuel, Muscle Cramps, and Another Dr. Oz Miracle

A few months ago I wrote an article on How to Fuel a Marathon. In this week’s Dear Mark, I answer a reader’s question on how to improve a hydration recipe I recommended in that article. Then I cover a somewhat related topic: muscle cramps, and how to fix them and how to prevent them. Finally, I discuss Dr. Oz’s latest supplement miracle product – raspberry ketones. Sounds delicious, doesn’t it? Let’s go.
Hi Mark,

I am in training for my first ever marathon and have read your how to fuel a marathon. I did try the homemade hydration drink on my training run last week of 24km. I had 2 bottles of hydration and 2 bottles of plain water. I found the drink very sweet and you can definitely taste the black slat molasses. Swigging water straight after did help but it wasn’t overly pleasant.

I thought I would give it a try as I plan to use it on my race day which is July 1st. I was thinking of reducing the black slat molasses to just 1 tablespoon to see if it reduces the very sweet taste and perhaps increase the raw honey to 3 tablespoons, to see if it’s more palatable. Would this have any effect on keeping hydrated?

Also what can I use to keep hydrated on my long training runs? I find water is just not enough and I get thirsty and start to hit the wall around 17km. So basically, how do you fuel your training runs?

It would be great if you could give me some advice on this.

Many thanks.

Regards
Alison

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Dear Carrie: Cellulite

Hi again, everyone. Thanks for the comments and emails in response to my last post on menopause and hot flashes. I’m working on getting through your questions and hope to do several posts throughout the summer that speak specifically to issues that matter to women. Now that summer is here for most of the country, it seems like a good time to share a frequent reader issue this time of year.
Dear Carrie,

I’m 35 and have been Primal for almost two years now. I’ve always been fairly thin, but going Primal in my eating and exercise has helped me get in better shape and build muscle. Unfortunately, I’m still plagued with some cellulite on the backs of thighs and hips. (Can I mention that I hate swimsuit season?) Why is cellulite so stubborn? Every “miracle cure” I’ve ever tried did next to nothing. Tell it to me straight – will this ever go away? Is there anything I can do? Thanks to you and Mark for everything you do with the Primal community.

Janet

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Dear Mark: CLA Supplements

Today’s question comes from Ola and regards CLA, or conjugated linoleic acid. What is CLA? CLA is the “good” trans-fat that occurs naturally in meat and dairy, especially from grass-fed animals. In the stomach of ruminants like cows, sheep, or goats, millions upon millions of bacteria help the animal digest its food. They also help convert dietary linoleic fatty acids into saturated fatty acids. Well, that conversion takes several steps, and one of the steps is the creation of CLA, some of which never gets fully saturated and instead shows up in the animal’s body and milk fat. 28 different CLA isomers, or structural arrangements of the molecules, appear in CLA-rich animal fat. It’s very complex and quite different from trans-fat created by partially hydrogenating vegetable oils. Those lab-created trans-fats have definite negative metabolic and health effects, while the panoply of various CLA isomers from grass-fed dairy and meat seem to be beneficial. With that said, let’s get to the question.

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Poor Sleep May Make You (and Your Liver) Fat

Ah, sleep. Nothing like a good dose of the stuff, right? Losing even a single wink of your usual forty (or an hour, as the case may be) is enough to throw off an entire day.

But do you know who might love sleep more than anyone or anything? Our livers.

Yes, livers. Those fleshy multivitamins with an apparent propensity for fat accumulation function best on a good night’s sleep. New research is revealing exactly why shift workers and other chronically sleep deprived members of mankind tend to have problems with obesity, insulin resistance, diabetes, heart disease, and all the other popular features of metabolic syndrome: their livers aren’t processing fat efficiently, instead allowing fat to accumulate.

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The Not So Definitive Guide to Diet Soda

Before I begin, I want to make something clear: this is not your standard definitive guide to whatever. I’d like to be able to issue a proclamation regarding diet soda that stands the test of time immemorial, but I cannot. Research is still in its infancy, and exactly what diet soda does to those who drink it – if anything – is incredibly confusing. The one thing I can say with any certainty is that, while it’s unfair to say it will kill you or give your unborn child prenatal tumors or make you impossibly obese, you’re probably better off without diet soda. It tastes weird, the list of unpronounceable ingredients is too long for my comfort level, and I’ve seen one too many unsuccessful dieters that seem to live on the stuff.

There are two things to consider when making any conclusions about diet soda’s place in a healthy diet. Do the ingredients used in diet soda pose a threat to your short-term or long-term (or that of your offspring’s) health? Is it a kind of sugary methadone, impeding healthy eating by making it harder to kick the desire for sweet things in your mouth because, well, you’re constantly putting things in your mouth that mimic sugar? Let’s dig in.

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Hunter-Gatherer Body Composition

A couple weeks ago in my post about health and vanity a good discussion got started in the comment board about the body composition of our hunter-gatherer ancestors. Was Grok lean and ripped or not? Let’s take a look at what we know.

It’s pretty well established that hunter-gatherers eating their traditional, whole-foods hunter-gatherer diet (whether Inuit, or Masai, or Pacific Islander, or whatever else) display little to no signs of the diseases of civilization. Infection, warfare, pestilence, starvation, and colonial incursion were occasional or even frequent sources of poor health outcomes, but for the most part they were well-nourished and free of degenerative diseases, even the long lived members. These guys weren’t dying for lack of statins or chemotherapy – let’s put it this way.

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