Today’s article is a guest post from Konstantin Monastyrsky of GutSense.org. In keeping with the mission statement of Mark’s Daily Apple to investigate, discuss, and critically rethink everything we’ve assumed to be true about health and wellness, I like to periodically give credible researchers who are challenging conventional wisdom the opportunity to share their insights and findings here. It’s a great way to open a dialogue on topics that deserve challenging. Like fiber, for instance. Everyone knows that fiber is good for you, right? Well, let’s find out what Konstantin—a guy who’s spent an incredible amount of time researching this topic—thinks about this truism. Enter Konstantin…
Does dietary fiber contain anything of nutritional value? No, it doesn’t. Zero vitamins… Zero minerals… Zero protein… Zero fat… Nothing, zilch, not even digestible carbohydrates. Why, then, is it considered a healthy nutrient? As the story goes, you can thank Dr. John Harvey Kellogg for that:
For today’s edition of Dear Mark, we’ve got a two-parter. First, Mathilde wonders whether she’s eating too little food. A high-fat, nutrient-dense Primal way of eating can have the effect of maximal satiation on fewer calories, and that’s usually fine, but there are instances where too few calories can have negative health effects. I tell her what symptoms to watch out for. After that, I discuss the issue of too much iron in the diet. It may be a concern for people with genetic tendencies to store excessive amount of iron, but what about regular people without those genetic variants?
I get a lot of protein powder-related questions. Some are requests to try or advertise a new product. Others are queries regarding all the different marketing claims. Is whey protein concentrate really better, more “immune-boosting,” and more complete than whey protein isolate? Who wins in a head to head deathmatch – isolate or concentrate? Should you be worrying about the grass-fededness (yep, that’s a word) of your whey protein? And is beef protein isolate better than everything else? It certainly appears to be the most paleo of the bunch, being made from, well, beef.
For today’s edition of Dear Mark, we’re going to sift through the marketing fluff and get to the meat of the matter. Let’s go:
Other than saturated fat, I can’t think of a nutrient that’s been so universally maligned and demonized as salt. All the experts hate it and recommend that we get as little of it as possible. They even all seem to have their own little anti-salt slogans. The American Diabetes Association recommends between 2300 and 1500 mg of sodium per day (“Be Sodium Savvy“). The American Heart Association wants you eating less than 1500 mg per day (“Shaking the Salt Habit“) and claims that 97% of young people already eat way too much salt. The other ADA – the American Dietetic Association – also recommends between 2300 and 1500 mg, but their slogan is far inferior (“Slice Your Sodium Intake“). It’s quite the pile-on, isn’t it?
Why does salt strike mortal terror into the hearts of so many?
I get a lot of emails about the “Eat Right For Your Type” diet, also known as the blood type diet, which asserts that specific optimal diets exist for each blood type. In this post, I’ll take a look at whether there’s anything to this idea, and whether you should change the way you’re eating based on whether you’re Type O, A, B or AB.
The proposed diets all tend to be pretty decent, whole foods-based ways of eating, and they’re all better than the standard American diet of industrial processed junk, but differences do exist. Here’s the basic breakdown of all four blood type diets:
Type O (PDF): The “original” blood type and the oldest one, proponents claim it evolved among hunter-gatherers in response to their (Primal) diet of animals and plants. People with this blood type do best on meat, fish, and certain fruits and vegetables while limiting starches and omitting grains (especially wheat), beans, legumes, and dairy. It’s pretty much a strict paleo approach.
Type A (PDF): The agricultural blood type, proponents claim it arose after the advent of agriculture. People with this blood type do best on vegetables, fruits, grains, beans, legumes, and limited fish. They should avoid meat, wheat, and dairy. It’s basically a vegetarian diet.
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