I highly recommend this book to everyone who is has wondered why Americans have become so unhealthy and obese despite a concerted effort by the medical establishment to push the low fat diet. Here are links to interviews with the author:
On NPR’s Science Friday:
http://www.sciencefriday.com/program/archives/200711024on CBC’s Quirks and Quarks:
http://www.cbc.ca/quirks/archives/07-08/nov17.htmlJust to clarify: GCBC isn't a diet advice book. It's a book about science and the history of how the low-fat nutritional dogma came to be perpetuated, despite any evidence of its effectiveness. Today the low fat/high carb diet is being challenged by an expanding pool of evidence that it is actually harmful. This book contains a phenomenal amount of research that proves the medical establishment and the government agencies wrong once and for all for promoting the low-fat high-carbohydrate fallacy that is literally killing people everywhere.
Taubes traces the history of many of the "sacred" concepts of modern nutrition and concludes many key ones are based on bad science and ego-driven scientists, who are more interested in defending their original hypothesis than in honestly interpreting data. What really shocked me was the extent of shoddy science that has existed over the years with regard to obesity and weight gain, the influence of politics and media in misleading the public, either deliberately or due to intellectual laziness. Taubes also touches upon grants and funding from Big Pharma and Big Food, who of course are interested in perpetuating this diet. Their corporate profits depend on it, so they fund many of the unscientific studies that the media and nutritional establishment accept as fact.
Taubes documents that the same factors that make us fat are the main causes of the chronic diseases of modern civilization: cancer, type 2 diabetes, high blood pressure, heart disease, and Alzheimer's. These diseases were relatively unknown in the third world until they adopted a more Western diet. Taubes includes the findings of Albert Schweitzer, who rarely treated these diseases in Africa, but at the end of his service was seeing a lot of them, as local diets began to include more grains, rice, refined carbohydrates and sugar.
Here's his summary list of points that are made in the book, all drawn from the book's epilogue:
1. Dietary fat, whether saturated or not, is not a cause of obesity, heart disease, or any other chronic disease of civilization.
2. The problem is the carbohydrates in the diet, their effect on insulin secretion, and thus the hormonal regulation of homeostasis--the entire harmonic ensemble of the human body. The more easily digestible and refined the carbohydrates, the greater the effect on our health, weight, and well-being.
3. Sugars--sucrose and high-fructose corn syrup specifically--are particularly harmful, probably because the combination of fructose and glucose simultaneously elevates insulin levels while overloading the liver with carbohydrates.
4. Through their direct effect on insulin and blood sugar, refined carbohydrates, starches, and sugars are the dietary cause of coronary heart disease and diabetes. They are the most likely dietary causes of cancer, Alzheimer's disease, and other chronic diseases of civilization.
5. Obesity is a disorder of excess fat accumulation, not overeating, and not sedentary behavior.
6. Consuming excess calories does not cause us to grow fatter, any more than it causes a child to grow taller. Expending more energy than we consume does not lead to long-term weight loss: it leads to hunger.
7. Fattening and obesity are caused by an imbalance--a disequilibrium--in the hormonal regulation of adipose tissue and fat metabolism. Fat synthesis and storage exceed the mobilization of fat from the adipose tissue and its subsequent oxidation. We become leaner when the hormonal regulation of the fat tissue reverses this balance.
8. Insulin is the primary regulator of fat storage. When insulin levels are elevated--either chronically or after a meal--we accumulate fat in our fat tissue. When insulin levels fall, we release fat from our fat tissue and use it for fuel.
9. By stimulating insulin secretion, carbohydrates make us fat and ultimately cause obesity. The fewer carbohydrates we consume, the leaner we will be.
10. By driving fat accumulation, carbohydrates also increase hunger and decrease the amount of energy we expend in metabolism and physical activity.
My sister has borrowed my copy, but I plan to read it again over Christmas break. I know that there are a lot of details that I missed. :-)