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

What if everything you think you know about the cause and cure of overweight and obesity is wrong? I mean seriously, harmfully wrong on an epidemic scale. In Why We Get Fat author Gary Taubes makes the passionate and urgent case that people are getting fat and diabetic because the so-called health advice they get is the exact opposite of what’s needed. Backed by a persuasive amount of detail, Taubes explains how our ideas and practices around fatness (and diseases related to fatness) have been corrupted by bad and incomplete science.

More specifically, the long-standing, rigid beliefs formed around the calories in/calories out theory and the role of dietary fat blocks the open consideration of alternative ideas and new information. He claims the ingrained practice of ignoring, rejecting and discounting fact-based evidence makes research seem more like religion than science. “… the individuals involved in this research have not only wasted decades of time, effort, and money, but have done incalculable damage along the way.”

Taubes is on a mission to undo the many misconceptions that “pass for public health and medical advice…and to arm you with the necessary information and logic to take your health and well-being into your own hands.” As an award-winning scientific journalist who spent the past decade rigorously tracking down and assimilating obesity research, he’s uniquely qualified to understand and present the big picture of scientific opinions and results. Despite legions of researchers and billions of government dollars expended, Taubes is the one to painstakingly compile this information, assimilate it, and make it available to the public.

It’s not really surprising to learn that most research is done in a vacuum, so to speak. Researchers don’t typically communicate or collaborate with each other, and there’s little understanding of how a small piece of the pie fits in with the whole. This is one of the major problems to be solved. In the meantime, Taubes does the important and extraordinary work of pulling it all together for us. The scientific evidence he collected is comprehensively detailed in his prior book, Good Calories Bad Calories, which should be required reading for all physicians and health care practitioners. Why We Get Fat has a similar follow-on message, but it’s written for the average person. That said, the content of Why We Get Fat still has a strong scientific orientation, which Taubes does not dumb down, so it may not appeal to all.

The fundamental flaw with obesity research and the proposed cure for it centers around the current interpretation of the law of thermodynamics. This is the law that says calories in less calories out equals body weight. Or, as everyone everywhere knows, the one and only right way to lose weight is to eat less and exercise more. Taubes explains how a simplistic, incomplete view of this law does not account for the regulation of fat tissue by hormones and enzymes, and thereby overlooks the underlying metabolic cause and disorder of fat growth. The role of insulin on fat tissue, for example, is not considered or factored into the thermodynamic equation. “…medical experts have been remarkably uninterested in the fat tissue itself.” 

Taubes reminds us that insulin is the primary regulator of fat metabolism. When insulin levels go up, fat is stored, and when insulin levels go down, fat is released. Likewise, insulin is also responsible for distortions and problems with fat metabolism. A common one is the constant over production of insulin from eating too many refined carbohydrates (foods made with flours and caloric sweeteners). This eventually results in “insulin resistance,” a condition where cells stop responding to the insulin. Insulin resistance is a primary indicator of type 2 Diabetes and a cluster of other systemic metabolic problems including high blood pressure, high triglycerides, low HDL cholesterol (the healthy cholesterol), high blood sugar, a big waist, and of course, obesity!

Despite the direct link between fat and insulin, mainstream researchers and the medical community continues to insist dietary fat is the root cause of obesity, type 2 diabetes and the other metabolic problems mentioned above. In fact, the idea that anything other than dietary fat might be the culprit in our diet is nutritional heresy. We’ve been programmed, relentlessly, to cut down on the amount of fat we consume and to eat “heart-healthy” foods like bread, cereal and pasta. These are the same flour-based foods mentioned above, that raise insulin. Saturated fat, by the way, lowers it. Therein is the crux of the contention. Is it dietary fat that’s to be avoided or is it white flour and caloric sweeteners?

About Karen Bentley

Author, Educator, Founder of The SugarFreeInstitute and SugarFree Nutrition and Weight Loss Expert. Over 15 published books. The Power to Stop: Stopping as a path to personal power, self-love and enlightenment is currently a bestseller on Amazon Kindle. For more info visit, or
  • Rachael Pontillo

    I am going to check this one out. It is so true that you cannot trust researchers at all. For every study saying one thing, there are twenty out there saying the exact opposite. It will be interesting to get a different point of view.

    I think it isn’t just fat/caloric intake that is the problem it is unhealthy, processed food and all of the fillers, preservatives, artificial sweeteners, colors, etc. People ate this in the seventies, but not to the extent that they do today. More people still ate whole foods and home cooked meals. People need to start doing that again.

  • Dana

    Rachael, it’s not fat intake or caloric intake that’s the problem *at all*. You are going to get completely different results from eating 2000 calories of fat a day than you will from eating 2000 calories of carbohydrate. IF you can manage 2000 calories of fat. Fat, unlike protein or carbohydrate, induces true satiety on a biochemical level.

    In every society that has had significant amounts of carbohydrate foods in their cuisine, there has been health damage and even obesity in those individuals who chose or were forced to eat a greater percentage of their diet as carbohydrate foods. The field of paleopathology shows that since the advent of grain agriculture we have become shorter, more prone to tooth decay and more susceptible to disease. Even ancient Egyptian art showed Pharoahs with pot bellies. None of this is anything new; we used to know, as a society, that sugar and starch caused overweight. We’ve been snookered by industrial food interests, the scientists whose research they’ve funded, and the politicians whose votes they buy.

  • Sandra Neary

    We were lucky enough to read Taube’s “Good Calories, Bad Calories” about two years ago and make several adjustments to the way we (used to) eat that have had remarkable results. I thank Karen Bentley for this complete and thoughtful assessment of “Why We Get Fat”. We include whole grains in our diet as well as lots of fresh vegies, but have eliminated virtually all sugar (including lactose and fructose) and all refined or processed foods. End result: we are much healthier and have lost a lot of weight. One small comment: in the “70′s” a lot of simple carb food was eaten far less regularly than it is today – a “treat” was once a month or once a year, not once a week or once a day. I believe that sort of “reward” eating is one of the factors influencing today’s trend towards obesity.

  • Paul

    When ever I live abroad, I lose weight, when I come back to the States, I gain it back. Learning to cook for myself helped a lot, too, because I was eating food instead of processed junk. Add to this cars making us a sitting society, and I’d say being unhealthy is built into the system.

  • Jeff

    You failed to mention that there are absolutely NO studies that equate fat intake with weight gain, heart disease or diabetes.
    You are absolutely wrong.

  • Flip

    Recent research suggests that a baby born today has a life-span of 80. So how ’bout we just stop sweating so much about what we should and shouldn’t eat, and just enjoy life? Everything in moderation, right? There’s bigger issues in this world to get uptight about than “carbs or fats”.