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Old January 24 2013, 09:29 AM   #64
gturner
Admiral
 
Location: Kentucky
Re: Obesity linked to a gut bacteria

Regarding the mass and energy equation, and disregarding intestinal nuclear reactions:

mass_in = mass_out + mass_stored

energy_in = energy_out + energy_stored
which is

food + water input + oxygen input = pee + poop + sweat + CO2 output + weight_gain

and

food energy value (when burned with oxygen) + work_input (massage therapist, etc) = (poop + pee) energy value + work_output + waste heat
+ stored_energy_for_zombie_attacks

I hate to ask this, but have any of the diet and nutrition experts made people poop into a calorimeter and burned it to see what the output energy was? If not, this thread has enough people for a rough stab at a study. As we cook our poos and record the results with an iPhone ap we'll write, should we post the inflow versus outflow or keep that kind of private?
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