The popular story of how low-carb diets work goes something like this: Reducing your carbohydrate in...
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
On June 23rd, the world changes. Every RV, Subaru Outback, and pickup truck in every neighborhood across the country disappears from city limits. Expect the swoosh of fiberglass poles sliding through tent fabric to resound across the land and millions of campfires to produce enough smoke to block out the sun. Molted marshmallow flows will destroy hundreds of homes, and millions of fathers sitting on Doug fir rounds by the fire will tell so many ghost stories that they summon actual phantoms from the spirit world. The nation’s circadian rhythms will get a hard reset back to the superior factory settings, thanks to avoidance of artificial light after dark. Or so we could hope….Read More
Last week’s Q&A about cultivating wildness was a lot of fun, but there were some questions I didn’t get to in the original post. Today, I’m going to answer some more. From stirring stories of a father and son pursuing and living their dream after experiencing extreme tragedy to how to go barefoot more safely to the balance between creativity, progress, and Primal values to accepting the reality (and beauty) of having work to do to the value of sun exposure in winter to circadian entrainment. In short, we’re covering a ton of ground today.
Let’s go:Read More
“In the winter months, when the sun’s rays are not intense enough to generate sufficient vitamin D production (this is the case for three to five months per year for locations in North American—you know it’s downtime for D when you can’t get a tan even with prolonged sun exposure), supplements and safe-designated artificial tanning implements can be useful or even essential if you are at high risk for deficiency.
If you have an indoor-dominant lifestyle or even a hint of aforementioned risk factors, you should regularly test your blood for vitamin D. (Make sure it’s for ’25-vitamin D’ or ‘serum 25(OH)D.’ You can order this test directly from an online provider like direct labs.com. or, if you are getting a routine checkup, insist they include vitamin D in your blood panels. (Unfortunately, it’s often not included.)”
—From The New Primal Blueprint
For more on vitamin D sources, deficiency, testing and recommended levels, see The New Primal Blueprint or check out past articles on MDA.Read More
For today’s edition of Dear Mark, I’m answering questions from last week’s hormone normalization post. First I discuss a lack of purpose in the mornings affecting sleep and what to do about it. Next, I explore the prospect of sun and fasting as hormone modulators. After that, I explain the meaning of max aerobic heart rate and correct a mistake I made. And finally, I suggest to one reader that she may need to eat more calories to normalize her sleep and thus her hormones.Read More
For today’s edition of Dear Mark, I’m answering just one question. But it’s a good (well, maybe not good, but certainly important) one: Why is male fertility on the rise and testosterone on the wane? The popular notion is that women flushing birth control pills and peeing estrogen-rich urine into the public water supply are the primary reasons for the sex hormone issues facing men, but I’m not so sure. Let’s explore what else might be causing the problem.Read More
For today’s edition of Dear Mark, I’m answering three questions from readers. First, is erythritol, one of the more common sugar alcohols, linked to weight gain? According to a new study, it is. What should we make of the research? Next, I talk a good game about chicken livers, but there’s a new study that seems to show they’re big repositories of arsenic. Should you stop eating chicken liver? And finally, I give a few tips for improving screen clarity when working outside on your laptop in full sun.
Let’s go:Read More