The popular story of how low-carb diets work goes something like this: Reducing your carbohydrate...
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
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:
One of the more exciting developments over the past few years has been the explosion in population genetics research. People are a diverse lot, and even though we’re all people who essentially want the same things out of life (and we’re working with the same basic machinery), there’s a lot of wiggle room. It’s not just information for curiosity’s sake. The information researchers are uncovering about human ancestry can have real ramifications for how said humans should eat.
A couple years ago, I wrote a post laying out a few guidelines for using your personal ancestry to inform your diet. Today, I’m going to talk about another one: polyunsaturated fat metabolism.
Imagine money is no object. Imagine you wield absolute control over the scientific community and can direct it to run whichever study you desire. If you can dream it up, they’ll get the subjects, produce the money, and make it happen. All you need to come up with is the overarching design. What would you choose? What do you wonder? What questions do you want answered once and for all?
Here’s what I’d choose:
“Back in my day, science came harder. We may not have had your fancy longitudinal data analyzing software, your iterated pool of available data upon which to build, or your worldwide network of instantaneous communication and information transmission, but we rolled up our sleeves and got to work just the same. And man did we do some science and discover some things. Boy, you don’t even know the half of it.”
When I turn my sights back to older research, I realize that a lot of this stuff we “discover” in health and nutrition has already been found, or at least hinted at. Today, I’m going to explore some of my favorite research from years past that, if posted to Science Daily or linked on Twitter today, would get a huge response.
For years, the ancestral health community has shunned the humble peanut. I did so myself in fact. “Why can’t I have peanuts?”a person would ask. “Because they’re legumes,” would be the standard answer. And that was that. The status of legumes was sacrosanct in paleo world. Case closed. In recent years, however, our stance on legumes has softened.
The lectins and phytic acid we worry about, it turns out, are mostly deactivated by heat and proper preparation. A bit of phytic acid can even be a good thing, provided you have the gut bacteria necessary to convert it into beneficial micronutrients. All in all, legumes turn out to be a relatively nutrient-dense source of resistant starch and other prebiotic fibers. If you can swing the carbs and you feel fine eating them, legumes are on the table.
For today’s edition of Dear Mark, I’m answering three questions from readers. First up, what are we to make of a recent study claiming to show that “high-fat diets” are harmful to rodents? Is it truly a high-fat diet, and what does it mean for us? For the second question, I field a comment from a reader experiencing a confluence of troubling symptoms and test results on his keto diet. And third, does keto actually cure diabetes, or just manage it?