A good synapses of how we were duped into getting fat

Here’s a great post from Matt Ridley on the conventional, but wrong, wisdom of low-fat diets. He writes:

There is a strong possibility that the “diabesity” epidemic has been caused largely by the diet police themselves.

The chief source of the anti-saturated-fat message was a politically astute scientist named Ancel Keys. In 1961 he persuaded the American Heart Association to issue guidelines on saturated fat intake. The main evidence came from his study of heart disease in six countries in Europe plus Japan, from which he concluded that low-fat diets led to less heart disease.

…the fat effect was weak: an order of magnitude less than the effect of cigarettes on cancer, for example.

Ridley’s writing here is based on the work of Nina Tiecholz, which I wrote about here and appears to be nearly identical to the work that Gary Taubes did in his books, who I’ve written about before, as well.

This from Ridley’s post is also interesting:

In the past ten years, study after rigorous study has found that animal fat per se is not harmful, does not cause obesity, does not raise the kinds of cholesterol that predict heart attacks, does not increase death rate and is healthier than carbohydrates. For instance, one two-year trial in Israel found that a fat-and-meat “Atkins” diet lowered weight more than either a low-fat or a Mediterranean diet. As Teicholz puts it in her book: “Every plank in the case against saturated fat has, upon rigorous examination, crumbled away.”

Such findings remain too heretical for most diet experts. Those who make them struggle for years to get published and have to couch their findings in cautious language. Those such as Teicholz and Gary Taubes who write books pointing out that this fat emperor had no clothes are treated as pariahs. If anything, the official committees of the diet police are doubling down, demanding that we eat ever less saturated fat.

If you are at all interested in losing weight, Gary Taubes’ books are worth a read.


Experts vs Trial and Error

Writing in the Wall Street Journal, Nina Teicholz casts doubt on the ‘conventional wisdom’ that saturated fat causes heart disease (thanks to The Pretense of Knowledge for the pointer).

Of course, Gary Taubes laid out much of the same story line in his book, Good Calories, Bad Calories. I mention it here and here.

Teicholz mentions President Eisenhower’s heart attack. She didn’t mention the additional detail that Taubes provided. His doctor cut his cholesterol intake and his cholesterol levels went up.

Teicholz, perhaps, summarizes the beginning of the Type II diabetic and obesity trends when unreliable health studies were used to guide the American diet:

As Harvard nutrition professor Mark Hegsted said in 1977, after successfully persuading the U.S. Senate to recommend Dr. Keys’s diet for the entire nation, the question wasn’t whether Americans should change their diets, but why not? Important benefits could be expected, he argued. And the risks? “None can be identified,” he said.

This is where I’ve gained much appreciation for what Nassim Taleb identified as the expert problem, as he describes here.

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