Saturday, January 26, 2019

Why We Get Fat and What to Do About It by Gary Taubes


Why We Get Fat and What to Do About It is a follow-up to Gary Taubes’ previous book, Good Calories, Bad Calories. While the first book was aimed at presenting arguments and evidence that might persuade experts to consider new—and revive old—models of nutrition and health, his more recent book is aimed at laypeople who want a more basic understanding of how our bodies manage weight and fat and how we can manage it.

The primary driving force in the way our body uses or stores fat is insulin. Chemicals in our body, primarily insulin, tell our cells when to burn glucose instead of ketones (a product of fat that can fuel our cells) and when to store fat. Though there are various factors that contribute to insulin production, the big driver—one we can control—is carbohydrates. Insulin increases when we eat carbs, instructing our cells to consume sugar (to get our blood sugar levels down) and store fat in the meantime. If we eat too many carbs, we stay in the sugar-burning, fat-storing mode and spend very little time burning fat.

The antidote to getting fat, then, is to eat less carbs. There is a genetic component to this, so how much a person needs to cut carbs to manage weight is individual to them. The upside is that almost anyone can get leaner but cutting carbs; the down side is that your genes govern how lean you can get, which may not be as lean as you want to be.

A more positive upside is that people can lay aside the guilt that come with the association of overweight with overeating and laziness. Appetite and energy levels are driven by the same processes that govern fat storage. In addition to losing weight, a low-carb diet can help one have more energy and less hunger.

Though Why We Get Fat is less reference-intensive that its predecessor, it is still full of references to research. It also covers the history of how the counterproductive calories in-calories-out model came to be dominant in American nutrition and health circles. The emphasis on the book is why.

Though Taubes focuses on why, he does not neglect what, thought the what (cut carbs) is fairly straightforward. He recommends a low-carb diet and includes a model in an appendix, though he also recommends an even simpler list of does and don’ts that goes back to the 1940s, before the calorie counting model took over the medical view of weight management.

I’ve been cutting back on carbs for a few days. I’ve seen my weight drop, but it is too early to say if it will continue. However, Taubes’ book has given me reason to believe it will work if I stick with it.

If you’re interested in this book, you may also be interested in


Taubes, Gary. Why We Get Fat and What to Do About It. New York: Alfred A. Knopf, 2012.

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