Thursday, March 17, 2011

Dr. Gary Taubes on Insulin

Great post by Dr. Gary Taubes on insulin, health and obesity.

Insulin puts fat in fat cells. That’s what it does. And our insulin levels, for the most part, are determined by the carb-content of our diet — the quantity and quality of the carbohydrates consumed. (Or if Jenny Brand Miller and her colleagues are right, also by our fat content — the lower the fat in the diet, the higher the insulin and vice verse.) The way to get fat out of fat cells and burn it, which is what we want to do with it, is to lower insulin. This has been known since the early 1960s.
One point I make in Why We Get Fat is that we all respond to this carbohydrate/insulin effect differently. Some of us can eat carbohydrate-rich meals and burn them off effortlessly. We’re the ones (like Oz) who partition the carbs we consume into energy. (This is the fuel gauge metaphor that I use in WWGF and that Oz’s producers reproduced wonderfully on the show.) And some of us partition the carbs we consume into fat for storage, and that partitioning depends on a lot of different enzymatic and hormonal factors — mostly relating to insulin and LPL as Williams Textbook of Endocrinology said)....
... A blanket recommendation to eat fruits and vegetables and whole grains, as Oz prescribes and now Weight Watchers and the U.S. Dietary Guidelines, ignores this aspect of human variability completely. It assumes that people who are predisposed to fatten can tolerate the same foods and benefit from the same very mild dose of carb-restriction that the naturally lean can.
I don’t think that’s true. It’s that simple. I think that if we’re so predisposed to fatten that we’re already obese, we’re probably among those who have to restrict carbs far more severely – have a much greater dose of the intervention – to get even relatively lean, which means relatively healthy. So for some of us and maybe most of us, even fruit, the nutritionist’s darling of the early 21st century, can be fattening , and if it’s fattening, it means it’s probably causing far more problems than whatever antioxidants or phtyochemicals it contains may be preventing.
Jump over to The Dose of Intervention and the Land of Dr. Oz for more.  The writing on his blog is brilliant, especially about overeating and being sedentary.

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