The Big Fat Surprise: Why Butter, Meat and Cheese Belong in a Healthy Diet

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9781451624427: The Big Fat Surprise: Why Butter, Meat and Cheese Belong in a Healthy Diet

A New York Times bestseller
Named one of The Economist’s Books of the Year 2014
Named one of The Wall Street Journal’s Top Ten Best Nonfiction Books of 2014
Kirkus Reviews Best Nonfiction Books of 2014
Forbes’s Most Memorable Healthcare Book of 2014
Named a Best Food Book of 2014 by Mother Jones
Named one of Library Journal's Best Books of 2014

In The Big Fat Surprise, investigative journalist Nina Teicholz reveals the unthinkable: that everything we thought we knew about dietary fat is wrong. She documents how the low-fat nutrition advice of the past sixty years has amounted to a vast uncontrolled experiment on the entire population, with disastrous consequences for our health.

For decades, we have been told that the best possible diet involves cutting back on fat, especially saturated fat, and that if we are not getting healthier or thinner it must be because we are not trying hard enough. But what if the low-fat diet is itself the problem? What if the very foods we’ve been denying ourselves—the creamy cheeses, the sizzling steaks—are themselves the key to reversing the epidemics of obesity, diabetes, and heart disease?

In this captivating, vibrant, and convincing narrative, based on a nine-year-long investigation, Teicholz shows how the misinformation about saturated fats took hold in the scientific community and the public imagination, and how recent findings have overturned these beliefs. She explains why the Mediterranean Diet is not the healthiest, and how we might be replacing trans fats with something even worse. This startling history demonstrates how nutrition science has gotten it so wrong: how overzealous researchers, through a combination of ego, bias, and premature institutional consensus, have allowed dangerous misrepresentations to become dietary dogma.

With eye-opening scientific rigor, The Big Fat Surprise upends the conventional wisdom about all fats with the groundbreaking claim that more, not less, dietary fat—including saturated fat—is what leads to better health and wellness. Science shows that we have been needlessly avoiding meat, cheese, whole milk, and eggs for decades and that we can now, guilt-free, welcome these delicious foods back into our lives.

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About the Author:

Nina Teicholz is an investigative science journalist and author as well as an advocate for evidence-based nutrition policy. Her work has appeared in The New York Times, The Wall Street Journal, The Independent, The Atlantic, and The New Yorker, among other places. She grew up in Berkeley, California, and now lives in New York.

Excerpt. Reprinted by permission. All rights reserved.:

The Big Fat Surprise Introduction


I remember the day I stopped worrying about eating fat. It was long before I started poring over thousands of scientific studies and conducting hundreds of interviews to write this book. Like most Americans, I was following the low-fat advice set forth by the US Department of Agriculture (USDA) in its food pyramid, and when the Mediterranean diet was introduced in the 1990s, I added olive oil and extra servings of fish while cutting back further on red meat. In following these guidelines, I was convinced that I was doing the best I could for my heart and my waistline, since official sources have been telling us for years that the optimal diet emphasizes lean meats, fruits, vegetables, and grains and that the healthiest fats come from vegetable oils. Avoiding the saturated fats found in animal foods, especially, seemed like the most obvious measure a person could take for good health.

Then, around 2000, I moved to New York City and started writing a restaurant review column for a small paper. It didn’t have a budget to pay for meals, so I usually ate whatever the chef decided to send out to me. Suddenly I was eating gigantic meals with foods that I would have never before allowed to pass my lips: pâté, beef of every cut prepared in every imaginable way, cream sauces, cream soups, foie gras—all the foods I had avoided my entire life.

Eating these rich, earthy dishes was a revelation. They were complex and remarkably satisfying. I ate with abandon. And yet, bizarrely, I found myself losing weight. In fact, I soon lost the 10 pounds that had dogged me for years, and my doctor told me that my cholesterol numbers were fine.

I might have thought no more about it had my editor at Gourmet not asked me to write a story about trans fats, which were little known at the time and certainly nowhere near as notorious as they are today. My article received a good deal of attention and led to a book contract.

The deeper I dug into my research, however, the more I became convinced that the story was far larger and more complex than trans fats. Trans fats seemed to be merely the latest scapegoat for the country’s health problems.

The more I probed, the greater was my realization that all our dietary recommendations about fat—the ingredient about which our health authorities have obsessed most during the past sixty years—appeared to be not just slightly offtrack but completely wrong. Almost nothing that we commonly believe today about fats generally and saturated fat in particular appears, upon close examination, to be accurate.

Finding out the truth became, for me, an all-consuming, nine-year obsession. I read thousands of scientific papers, attended conferences, learned the intricacies of nutrition science, and interviewed pretty much every single living nutrition expert in the United States, some several times, plus scores more overseas. I also interviewed dozens of food company executives to understand how that behemoth industry influences nutrition science. The results were startling.

There’s a popular assumption that the profit-driven food industry must be at the root of all our dietary troubles, that somehow food companies are responsible for corrupting nutrition recommendations toward their own corporate ends. And it’s true, they’re no angels. In fact, the story of vegetable oils, including trans fats, is partly about how food companies stifled science to protect an ingredient vital to their industry.

Yet I discovered that on the whole, the mistakes of nutrition science could not primarily be pinned on the nefarious interests of Big Food. The source of our misguided dietary advice was in some ways more disturbing, since it seems to have been driven by experts at some of our most trusted institutions working toward what they believed to be the public good.

Part of the problem is easy to understand. These researchers ran up against an enduring problem in nutrition science, which is that much of it turns out to be highly fallible. Most of our dietary recommendations are based on studies that try to measure what people eat and then follow them for years to see how their health fares. It is, of course, extremely difficult to trace a direct line from a particular element in the diet to disease outcomes many years later, especially given all the other lifestyle factors and variables at play. The data that emerge from these studies are weak and impressionistic. Yet in the drive to fight heart disease (and later obesity and diabetes), these weak data have had to suffice. And this compromise by researchers appears to have driven many of nutrition policy’s failures: well-intentioned experts, hastening to address growing epidemics of chronic disease, simply overinterpreted the data.

Indeed, the disturbing story of nutrition science over the course of the last half-century looks something like this: scientists responding to the skyrocketing number of heart disease cases, which had gone from a mere handful in 1900 to being the leading cause of death by 1950, hypothesized that dietary fat, especially of the saturated kind (due to its effect on cholesterol), was to blame. This hypothesis became accepted as truth before it was properly tested. Public health bureaucracies adopted and enshrined this unproven dogma. The hypothesis became immortalized in the mammoth institutions of public health. And the normally self-correcting mechanism of science, which involves constantly challenging one’s own beliefs, was disabled. While good science should be ruled by skepticism and self-doubt, the field of nutrition has instead been shaped by passions verging on zealotry. And the whole system by which ideas are canonized as fact seems to have failed us.

Once ideas about fat and cholesterol became adopted by official institutions, even prominent experts in the field found it nearly impossible to challenge them. One of the twentieth century’s most revered nutrition scientists, the organic chemist David Kritchevsky, discovered this thirty years ago when, on a panel for the National Academy of Sciences, he suggested loosening the restrictions on dietary fat.

“We were jumped on!” he told me. “People would spit on us! It’s hard to imagine now, the heat of the passion. It was just like we had desecrated the American flag. They were so angry that we were going against the suggestions of the American Heart Association and the National Institutes of Health.”

This kind of reaction met all experts who criticized the prevailing view on dietary fat, effectively silencing any opposition. Researchers who persisted in their challenges found themselves cut off from grants, unable to rise in their professional societies, without invitations to serve on expert panels, and at a loss to find scientific journals that would publish their papers. Their influence was extinguished and their viewpoints lost. As a result, for many years the public has been presented with the appearance of a uniform scientific consensus on the subject of fat, especially saturated fat, but this outward unanimity was only made possible because opposing views were pushed aside.

Unaware of the flimsy scientific scaffolding upon which their dietary guidelines rest, Americans have dutifully attempted to follow them. Since the 1970s, we have successfully increased our fruits and vegetables by 17 percent, our grains by 29 percent, and reduced the amount of fat we eat from 43 percent to 33 percent of calories or less. The share of those fats that are saturated has also declined, according to the government’s own data. (In these years, Americans also began exercising more.) Cutting back on fat has clearly meant eating more carbohydrates such as grains, rice, pasta, and fruit. A breakfast without eggs and bacon, for instance, is usually one of cereal or oatmeal; low-fat yogurt, a common breakfast choice, is higher in carbohydrates than the whole-fat version, because removing fat from foods nearly always requires adding carbohydrate-based “fat replacers” to make up for lost texture. Giving up animal fats has also meant shifting over to vegetable oils, and over the past century the share of these oils has grown from zero to almost 8 percent of all calories consumed by Americans, by far the biggest change in our eating patterns during that time.

In this period, the health of America has become strikingly worse. When the low-fat, low-cholesterol diet was first officially recommended to the public by the American Heart Association (AHA) in 1961, roughly one in seven adult Americans was obese. Forty years later, that number was one in three. (It’s heartbreaking to realize that the federal government’s “Healthy People” goal for 2010, a project begun in the mid-1990s, for instance, was simply to return the public back to levels of obesity seen in 1960, and even that goal was unreachable.) During these decades, we’ve also seen rates of diabetes rise drastically from less than 1 percent of the adult population to more than 11 percent, while heart disease remains the leading cause of death for both men and women. In all, it’s a tragic picture for a nation that has, according to the government, faithfully been following all the official dietary guidelines for so many years. If we’ve been so good, we might fairly ask, why is our health report card so bad?

It’s possible to think of the low-fat, near-vegetarian diet of the past half-century as an uncontrolled experiment on the entire American population, significantly altering our traditional diet with unintended results. That may sound like a dramatic assertion, and I never would have believed it myself, but one of the most astonishing things I learned over the course of my research was that for thirty years after the low-fat diet had been officially recommended and we were taking its supposed benefits for granted, it had not been subjected to a large-scale, formal scientific trial. Finally, there was the Women’s Health Initiative (WHI), a trial that enrolled 49,000 women in 1993 with the expectation that when the results came back, the benefits of a low-fat diet would be validated once and for all. But after a decade of eating more fruits, vegetables, and whole grains while cutting back on meat and fat, these women not only failed to lose weight, but they also did not see any significant reduction in their risk for either heart disease or cancer of any major kind. WHI was the largest and longest trial ever of the low-fat diet, and the results indicated that the diet had quite simply failed.

Now, in 2014, a growing number of experts has begun to acknowledge the reality that making the low-fat diet the centerpiece of nutritional advice for six decades has very likely been a bad idea. Even so, the official solution continues to be more of the same. We are still advised to eat a diet of mostly fruits, vegetables, and whole grains with modest portions of lean meat and low-fat dairy. Red meat is still virtually banned, as are whole-fat milk, cheese, cream, butter, and, to a lesser extent, eggs.

A line of argument in favor of eating these whole-fat animal foods has sprung up among cookbook authors and “foodies,” who can’t believe that all the things their grandparents ate could really be so bad for them. There are also the Paleo eaters, who swap information on Internet blogs and survive on little else but red meat. Many of these recent animal foods devotees have been inspired by the doctor whose name is most closely associated with the high-fat diet: Robert C. Atkins. As we will see, his ideas have endured to a surprising extent and have been the subject of a great deal of scholarship and scientific research in recent years. But newspapers still carry alarming headlines about how red meat causes cancer and heart disease, and most nutrition experts will tell you that saturated fat is absolutely to be avoided. Hardly anyone advises otherwise.

In writing this book, I had the advantage of approaching the field as a scientifically minded outsider free from affiliation with or funding from any entrenched views. I’ve reviewed nutrition science from the dawn of the field in the 1940s up until today to find the answer to the questions: Why are we avoiding dietary fat? Is that a good idea? Is there a health benefit to avoiding saturated fat and eating vegetable oils instead? Is olive oil truly the key to a disease-free long life? And are Americans better off having attempted to rid the food supply of trans fats? This book does not offer recipes or specific dietary recommendations, but it does arrive at some general conclusions about the best balance of macronutrients for a healthy diet.

In my research I specifically avoided relying upon summary reports, which tend to pass along received wisdoms and, as we’ll see, can unwittingly perpetuate bad science. Instead, I’ve gone back to read all the original studies myself and in some cases have sought out obscure data that were never intended to be found. This book therefore contains many fresh and often alarming revelations about flaws in the foundational work of nutrition as well as the surprising ways in which it was both ill-conceived and misinterpreted.

What I found, incredibly, was not only that it was a mistake to restrict fat but also that our fear of the saturated fats in animal foods—butter, eggs, and meat—has never been based in solid science. A bias against these foods developed early on and became entrenched, but the evidence mustered in its support never amounted to a convincing case and has since crumbled away.

This book lays out the scientific case for why our bodies are healthiest on a diet with ample amounts of fat and why this regime necessarily includes meat, eggs, butter, and other animal foods high in saturated fat. The Big Fat Surprise takes us through the dramatic twists and turns of fifty years of nutrition science and lays out the evidence, so that a reader can fully understand the evidence to see for him- or herself how we arrived at our present understanding. At its heart, this book is a scientific investigation, but it is also a story about the strong personalities who corralled colleagues into believing their ideas. These ambitious, crusading researchers launched the entire American population, and subsequently the rest of the world, on the low-fat, near-vegetarian diet, a regime that ironically may have directly exacerbated many of the ills it was intended to cure.

For all of us who have spent much of our lives believing and following this diet, it is of vital importance to understand how and what went wrong, as well as where we might go from here.

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