The Experts Speak: Nutrition

I have nothing against a paleolithic diet, but I think its advocates, like many experts, are overconfident. It’s not easy to know which features of a diet that varies in 20 ways from modern diets are the crucial ones. I came across this while reading about paleolithic diets:

The general gist of eating like a caveman—namely, focusing on foods in their whole, natural state, is not going to get much argument. “It comes down to the advice your mother gave you,” says Leonard [William Leonard, chair of the anthropology department at Northwestern University]. “Eat a balanced diet and a diversity of foods.”

I beg to differ.

1. Whole, natural state. I find flaxseed oil very helpful. It supplies omega-3 missing from my diet, but presumably present in diets that contained lots of seafood or vegetation-fed meat. Flaxseed oil is not food in a whole and natural state.

2. Whole, natural state . I find fermented food very helpful. Bacteria break down food, making it less whole. Modern food of all sorts is unnaturally low in bacteria (due to refrigeration, food safety laws, shelf-life requirements, etc.), just as modern meat is unnaturally low in omega-3. Fermented food is unnaturally high in bacteria, correcting the deficit.

3. The advice your mother gave you. Traditional diets, yes, what your mom thinks, no. When I was growing up we ate margarine instead of butter — poor choice. We had skim milk, not whole milk — poor choice. The absence of butter and whole milk is, if Weston Price is right, why my teeth are slightly crooked. We ate almost no fermented food — very poor choice. (Which I suspect is why I had mild allergies.) We rarely ate fish — poor choice. And yet we didn’t have a TV — very good, very unusual choice. Even my mom, who thought for herself far more than most moms, had serious misconceptions about nutrition. Given the epidemic of childhood obesity, not to mention less visible increases in autism, allergies, and ADHD, I am very skeptical that the average kid’s mom knows what to eat.

4. Eat a balanced diet. Plenty of communities in excellent health eat diets that American experts would describe as not balanced at all — no fruit for example, or too much dairy. Eskimos and the Swiss in isolated villages studied by Weston Price are two examples. Price found that a wide range of diets, most violating one or more popular nutritional precepts, produced excellent health.

5. A diversity of foods. Several healthy communities studied by Price did not eat a wide range of foods. The human diet became a lot more diverse around the time of the “ broad-spectrum revolution” — broad-spectrum meaning wider range of food. Around that time human height decreased. Apparently the new, more diverse diet was less healthy than the old diet. An anthropology professor might know this.

The title of this post comes from the book The Experts Speak which is full of examples of how experts were wildly wrong.

Fermentation Basics: Using Yogurt

Brent Pottenger writes:

In place of mayonnaise, my brother started using plain yogurt to make tuna salad. In the process, he learned, “For some reason, the tuna tastes better after sitting in the refrigerator for a day or two.” Tuna salad made with yogurt is tolerable when freshly made, but it definitely gets much better as it ages.

Now, when I make smoothies, I blend the fruit and the yogurt, then I let the smoothie sit for some hours, minimally, before I drink it.

Less of a Foodie

Two weeks ago I was in New York City. I have been there many times. For the first time, I was unexcited by the prospect of eating in the city’s fascinating restaurants. I think it’s all the fermented food I eat (at least two servings per day). All of it has complex flavors; all the New York restaurant food I liked had complex flavors. I am no longer complex-flavor-deprived.

How Could They Know? The Case of Healthy Gums

During my last dental exam, a month ago, I was told my gums were in excellent shape. Clearly better than my previous visit. The obvious difference between the two visits is that I now eat lots of fermented food. At the previous visit, my gums were in better shape than a few years ago. They suddenly improved when I started drinking a few tablespoons of flaxseed oil every day. Tyler Cowen is the poster child for that effect. After a lifetime of being told to brush and floss more — which I did, and which helped a little but not a lot — it now turns out, at least for me, that the secret of healthy gums is: 1. Eat fermented foods. 2. Consume omega-3. These two guidelines are not only a lot easier than frequent brushing and flossing but have a lot of other benefits, unlike brushing and flossing.

Dentistry is ancient and there are millions of dentists, but apparently the profession has never figured this out. This isn’t surprising — how could they figure it out? — but it is an example of a general truth about how things get better. (Or why they don’t get better — if only dentists and dental-school professors are allowed to do dental research.) In The Economy of Cities, Jane Jacobs makes this point. For a long time, Jacobs says, farming was a low-yield profession. Then crop rotation schemes, tractors, cheap fertilizer, high-yield seeds, and dozens of other labor-saving yield-increasing inventions came along. Farmers didn’t invent tractors. They didn’t invent any of the improvements. They were busy farming. Just as dentists are busy doing dentistry and dental-school professors are busy studying conventional ways of improving gum health.

Jacobs also writes about the sterility of large organizations — their inability to come up with new goods and services. On the face of it, large organizations, such as large companies, are powerful. Yes, they can be efficient but they can’t be creative, due to what Jacobs calls “the infertility of captive divisions of labor.” In a large organization, you get paid for doing X. You can’t start doing X+Y, where Y is helpful to another part of the company, because you don’t get paid for doing Y. A nutrition professor might become aware of the anti-inflammatory effects of flaxseed oil but wouldn’t study its effects on gum health. That’s not what nutrition professors do. So neither dentists nor dental-school professors nor nutrition professors could discover the effects I discovered. They were trapped by organizational lines, by divisions of labor, that I was free of.

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