Monday, November 16, 2009

Good Calories, Bad Calories - Review

On page 169 of his book, Gary Taubes quotes Albert Einstein, who once said that “Everything should be made as simple as possible, but no simpler.”

Why didn’t Gary take Albert’s words to heart?!!!

This book is awesome, in every sense of the word. It is a comprehensive look at the research surrounding diet and obesity, since research in that area began.

It is also incredibly dense and difficult to read, and, I think, poorly structured. Themes, dates, studies, characters, are repeated throughout the book. I wish Gary had hired an editor!!!

That being said, the book is still incredible. It’s an amazing look into the vagaries of science – that there is essentially only conflicting evidence around the diet-heart, or cholesterol-heart hypotheses, and that those ideas have been driven mostly by fame-hungry researchers, or by the impetus of the thrust of research itself (once the general tenor is set, research tends to continue in the same direction). It is a fascinating look at human dietary physiology.

Earlier today, I was speaking with a client about this book, and saying that I had reached the point (at page 384…roughly 80 still to go, after two months of plodding) where I wished Gary had produced a Cliff Notes version of his book.

Then, lo and behold, on page 453-4 of the book, he does. I’ll quote the entire “summation” here, because I think the message is important. It goes against everything we’ve been told for the past 30-50 years. But that stuff wasn’t really backed up by anything at all. Read the following passage, and if you’re still interested, read the book!

“As I emerge from this research, though, certain conclusions seem inescapable to me, based on the existing knowledge:

1. Dietary fat, whether saturated or not, is not the 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 the 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.”

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