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Selasa, 27 Maret 2012

The First Law of Thermo still doesn't violate The Second Law

Well, I've been meaning to weigh in on the Bray overfeeding study (Effect of Dietary Protein Content on Weight Gain, Energy Expenditure, and Body Composition During Overeating) that made a bit of a splash a little while back. George Bray is especially hated by ardent low carb advocates because he wrote a particularly unfavorable review of GCBC published in Obesity Reviews.   Bray is what Adam Kosloff refers to as a "Calorie Wizard":
Regardless of diet, it is a positive energy balance over months to years that is the sine qua non for obesity. Obese people clearly eat more than do lean ones, and food-intake records are notoriously unreliable, as documented by use of doubly labelled water.  Underreporting of food intake is greater in obese than in normal-weight people and is worse for fat than for other macronutrient groups.  Accepting the concept that obesity results from a positive energy balance does not tell us why energy balance is positive.  This depends on a variety of environmental factors interacting with the genetic susceptibility of certain individuals.  Weight loss is related to adherence to the diet, not to its macronutrient composition.
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