Hypertension is a problem. It raises the risk of heart disease; it’s one of the most consisten...
In this edition of Dear Mark, I provide rapid fire answers to five of your questions. First, I discuss another situation where the deload week(s) make(s) sense and may even have to be extended: when exercise starts taking away from the quality of your life. Next I explain why for some people raw milk is a highly-coveted food, and then whether or not a banana should be breakfast. After that, I discuss the potential impact of ketosis on breastfeeding. Finally, I discuss the benefits and potential downsides of Bikram yoga.
Let’s go:Read More
Perhaps the most common question I get from readers is some variation on the classic “Is X Primal?” Probably a half dozen times a day, “Is this Primal?” or “Is that Primal?” pop up in my inbox, often attached to some ridiculous food or product. My personal favorite was “Is whole wheat bread Primal?” (it’s not), closely followed by “What’s more Primal, red or black licorice?” But that’s not to suggest that all I get is nonsense. Some – most, even – are actually quite reasonable queries about foods that either seem to reside in Primal limbo, get talked up by people who you’d think would “know better,” or just taste really good and have people hoping that somehow, someway they’re compatible with Primal living.
Today, I’ll be scrutinizing ten commonly asked-about foods. Let’s go:Read More
I’m really liking these Monday morning rapid fire question-and-answer sessions – are you? At some point, I’ll get back to the musings, but as long as you keep sending in great questions, I’ll probably keep answering them. We’ve got four this week: vinegar and its effect on insulin levels, sugar and DNA damage, the nutritional merits of lactose-free milk, and whether Miracle Noodles are Primal. So let’s get started.
I have read that apparently cider vinegar influences/ reduces insulin level after a high carb meal. I was wondering what Grock’s view on this point is?
Thank you for looking into this & your time.
Diabetes is that rare brand of nasty disease that fails to strike real, visceral fear. It doesn’t carry the weight of a cancer or an AIDS or a heart disease. It’s something you get, like a gut, a long list of prescriptions, and a walker, as you grow older. People just live with it – millions upon millions across the world – and are rarely shocked or surprised to hear that others have it. Their ranks are ever growing, with, if a recent study on the effects of gestational diabetes on the fetus has anything to say about it, much of the conscription taking place in the womb. It’s called intergenerational diabetes, and it means that pregnant women with diabetes or even just poor maternal glucose tolerance could be turning their little ones into future type 2 diabetics. This is fetal diabetes without a genetic component; this is epigenetic owing to environmental (womb) input. The authors speculate that pregnant mothers with type 2 diabetes (diet and lifestyle induced, remember) could engender irreversible alterations to both the unborn kid’s hypothalamic neural network (where leptin, the satiety hormone, does its thing), pancreatic function, and muscle and liver insulin signaling. The idea is that they pop out with type 2 diabetes right off the bat. It’s diet-induced, sure, but not how we normally think of it. No baby bottle full of Coke required here. Of course, I still see this sort of condition as being reversible with diet and exercise…it’s just that it will require a LOT more adherence and starting at an earlier age. Moving on…Read More
Insulin is an old, old hormone. Evolution has preserved its structure across hundreds of millions of years and hundreds of thousands of species. Fish, insects, reptiles, birds, and mammals all secrete insulin with fairly similar amino acid arrangements (insulin from certain species of fish has even been clinically effective in humans), so, clearly, it is a vital hormone. But insulin gets a bad rap in our circles. Why? With metabolic syndrome laying waste to the citizenry and with insulin playing an undeniable role, it’s difficult not to be soured on this hormone.
And yet we need insulin to shuttle all sorts of nutrients into cells, like protein and glycogen into muscles. It’s there for a reason, so to demonize it is misguided. It’s chronically elevated insulin and insulin resistance – you know, the hallmarks of metabolic syndrome – that are the problem. You might have noticed a softening stance on carbohydrates around the paleo and Primal blogosphere. I think it’s simply an acknowledgment that in healthy people with healthy glucose control and healthy insulin responses who engage in glycolytic activity, starch is fine in measured amounts. And if insulin increases to shuttle that starch and protein into the insulin sensitive muscle cells, so be it. That’s why it’s there.
But not everyone (anyone?) lives a perfect Primal existence. And even if you did an understanding of how insulin works and what foods and behaviors affect it’s production should be high priority. Especially for the millions of people immersed in the modern, industrial lifestyle, with deranged metabolisms from years of poor eating habits (i.e. most of us).
Which brings us to dairy and its effect on insulin.Read More
Dairy resides in a murky area for some of you guys, but I think most of us can appreciate a good slab of grass-fed butter, maybe a bit of raw cheese, and some fermented dairy, either kefir or yogurt. A select few may not. If dairy makes you feel bad, don’t use it – it’s unnecessary – but if your avoidance stems purely from principle (ie, “it’s a little too Neolithic for me; I’ll just play it safe and avoid it altogether”), the latest study on dairy fat might nudge you toward its thick, viscous, white embrace. Researchers found that patients who ate the most dairy fat, from things like cream, whole milk, and butter, had a 60% lower risk of developing diabetes than patients eating the least dairy fat.
Those who ate the most dairy fat also showed the highest plasma levels of a fatty acid called trans-palmitoleic acid, prompting the study’s authors to zero in on that particular fatty acid as the potentially causative factor. There is a tendency to reduce foods to their individual constituents. Individual constituents, after all, can be “candidates for potential enrichment… and supplementation,” which makes a doctor’s job that much easier, and makes it easy to explain away “paradoxes.” Just wait: trans-palmitoleic acid is gonna be the new red wine when it comes to explaining the “French paradox.” At the end of the day, though, they do admit that “efforts to promote exclusive consumption of low-fat and nonfat dairy products … may be premature.” Hey, it ain’t much, but I’ll take it.Read More