Category: Gut Health

The Curious Phenomenon of “Keto Crotch”

I have a confession to make: I, Mark Sisson, suffer from keto crotch.

It’s embarrassing, really. I thought maybe it was just the change in climate moving from Malibu to Miami—the humidity, the heat, the fact that I’m paddling and swimming more often now. There’s a whole lot of moisture down there. Perpetual steaminess.

But then I met up with my writing partner and good pal Brad Kearns, who’s been working with me on my upcoming book. Brad lives in Northern California, which is far from hot or humid right now. He’s also a staunch keto guy most of the time, and, well, let’s just say I could smell him before I could see him. We met up at a coffee shop and cleared out everyone in a fifteen foot radius. We sampled a new exogenous ketone product he’s been trying and not one, not two, but three separate individuals approached to inquire if we were salmon fishermen.

Okay, let’s get serious. (And, yes—to address some reader confusion there—the above is pure satire.) Does “keto crotch” really exist? And, if it does, what can you do to prevent it?

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Dear Mark: Broth, Fasting, Coffee, and Metformin (and More)

For today’s edition of Dear Mark, I’m answering a bunch of questions from comment sections. First, did I get AMPK and mTOR mixed up in a recent post? Yes. Second, I give a warning for those who wish to add ginger to their broth. Third, is it a problem that we can’t accurately measure autophagy? Fourth, how does coffee with coconut oil affect a fast? Fifth, is there a way to make mayonnaise with extra B12 and metformin? Actually, kinda. Sixth, should you feel awkward about proposing hypotheses or presenting scientific evidence to your doctor? No.

Let’s go:

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After Whole30 or Other Reset: 11 Tips for Reintroducing Allergenic Foods

So, you’ve done a Whole 30® (or other dietary reset involving the removal of potentially allergenic or sensitizing foods to establish homeostasis). It’s over. It went well. You feel good. You’re ready to take on the world. Now what?

Officially, you’re supposed to reintroduce the allergenic foods you removed, one at a time, to see how they affect your digestive, psychological, metabolic, and overall health. After all, the main point of the Whole 30 is to uncover the allergenic foods that actually bother you and the ones that don’t. A broad, diverse diet is awesome if you tolerate it, and having more foods available to eat makes living easier and more enjoyable. There’s no reason not to eat legumes (or dairy, or a glass of wine) if you like them and they don’t negatively affect your health.  The reintroduction phase of the Whole 30 simply helps you learn which of those foods work and which don’t. That said, it’s intimidating for a lot of folks….

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8 Misconceptions About Fiber

The tricky thing about fiber is that it’s not a monolith. There are dozens of varieties. Some of them perform similar functions in the body, but others have extremely unique effects. Some rend your colonic lining to stimulate lubrication. Some turn into gelatinous slurries. But we can’t talk about fiber without understanding that the word describes a variety of compounds. As such, anyone making declarative statements about “fiber” without differentiating between the different types and their effects isn’t being accurate (except for me in that exact sentence).

This leads to a lot of confusion. People make blanket statements that might be true for some types of fibers and incorrect for others. 

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Restless Legs Syndrome: Causes, Factors and Treatments

For anyone who’s experienced it, the frustration can be miserable. The countless tossing and turning, the minutes that tick by (turning into hours), and you STILL haven’t gotten a modicum of decent sleep. No matter how hard you try to ignore it, that urge to constantly move or stretch your legs just won’t let up.
Restless legs syndrome (RLS), aka Willis-Ekbom disease, affects a decent chunk of the population: thought estimates vary wildly, this 2017 representative survey places its prevalence between 5.7 and 12.3% of the population. That’s up to around 40 million people in the U.S. alone who go to bed every night knowing they’ll likely be kept awake for hours with that unrelenting, restless sensation.

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Primal Knowledge Point: FODMAP

“Some people continue to suffer uncomfortable digestive problems despite omitting the foods they may be intolerant to. If there are no definite test results pointing at an allergy or intolerance, then you’ll most likely be diagnosed with irritable bowel syndrome (IBS).

Scientists Peter Gibson and Susan Shepherd at Moash University in Australia researched the reasons behind the vicious cycle of bloating, diarrhea, constipation, and discomfort. They came upon some evidence proving that certain sugars could actually be the cause of many of these ailments: ‘Fermentable Oligo-Di-Monosaccharides and Polyols,’ thus founding the term FODMAP.

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