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It's thermodynamics. Living takes energy, and that energy needs to come from somewhere. We can't photosynthesize energy, and we can't get it from air or water.
by jcromartie 15y ago
It's thermodynamics. Living takes energy, and that energy needs to come from somewhere. We can't photosynthesize energy, and we can't get it from air or water. So if there's not enough energy in food to sustain our body's processes, then it must come from stores in the body (fat).
I don't think there's any other possibility.
- wpietri 15y agoWeight loss only reduces to simple thermodynamics if the body is functionally equivalent to a coal furnace. It turns out metabolism is more subtle than that.
- jcromartie 15y agoThere are subtleties to nutrition and weight loss, of course. But let's say you stopped eating, and you didn't just die: do you think it's somehow possible to NOT lose body mass?
- wpietri 15y agoOf course not, and nobody here thinks that.