The selling point of books like Ultra-Processed People is the idea that everything you know is wrong. [Chris] Van Tulleken, an infectious diseases doctor and television presenter, takes this to extremes. In this book, almost everybody is wrong, many of them are corrupt and almost no one is to be trusted. Only Dr. van Tulleken, a handful of researchers and anyone who pays £25 to read this book knows the real truth. The problem is not sugar. The problem is not carbs. Artificial sweeteners don’t work. Exercise doesn’t work. Willpower doesn’t work. Every scientist who has published research contradicting his theory is in the pay of the food industry or — how’s this for an ad hominem argument? — has cited studies by people who are.

What is the effect of processing anyway? That is the key question and Ultra-Processed People never adequately answers it. If, as van Tulleken argues, the issue is not about specific nutrients and it is not about food being high in calories per se, there must be something else going on. He asserts, rather contentiously, that a £10 pizza from his local pizzeria is “not associated with obesity or diet-related diseases” but a cheap UPF pizza is.

Both pizzas have roughly the same number of calories, fat, salt and sugar. But one is a traditional food not associated with obesity or diet-related, while the other isn’t.

….

It is not a scientific argument and the whole UPF craze is a backwards step for science. At the practical level, it bluntens the tools of observational epidemiology by constructing a huge category of food to be studied as if it were a single risk factor. More broadly, it creates mistrust of science by treating “chemicals” as inherently suspicious and, as we shall see in parts two of this review, by portraying thousands of scientists as corrupt.

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