I was reading Dr. Eades' excellent blog entry today on Taubes' new  
book  
(http://www.proteinpower.com/drmike/low-carb-library/why-we-get-fat/)  
and even he claims that the body is a closed system with respect to  
calories.  Two reasons why this may not be so:

1) Calories are measured with a bomb calorimeter.  The body may not  
"burn" food the same way this instrument does.

2) The calories in, calories out formula never takes into  
consideration calories *excreted."

Thoughts?

Jim Swayze
www.fireholecanyon.com