> Like you said, the body must obey the laws of thermodynamics.
Perhaps I'm reading more into it than you intend, but a pure thermodynamics view assumes if you eat an extra 1000 calories that it will be stored as fat, does it not?
I know from personal experience this is simply not true.
But maybe you're only referring to the weight loss end of the spectrum? In which case yes, there are certain laws that the body simply cannot defy - however, with very small variance in calories, evidence suggests the body can switch metabolism levels, so once again, it's not quite simple thermodynamics - conversion efficiency varies.
> but a pure thermodynamics view assumes if you eat an extra 1000 calories that it will be stored as fat, does it not?
Replace "will" by "might", and you're there. Thermodynamics just say the energy must go somewhere, but whether it's your fat cells or your excrements (or maybe some other channel I'm not aware of right now) is a matter of medicine.
body heat
whole point of having high metabolism is your body simply gets rid of excess energy by heating up(100W on average?). Its burning calories while you sleep.
Perhaps I'm reading more into it than you intend, but a pure thermodynamics view assumes if you eat an extra 1000 calories that it will be stored as fat, does it not?
I know from personal experience this is simply not true.
But maybe you're only referring to the weight loss end of the spectrum? In which case yes, there are certain laws that the body simply cannot defy - however, with very small variance in calories, evidence suggests the body can switch metabolism levels, so once again, it's not quite simple thermodynamics - conversion efficiency varies.