If fat were deposited and not burnt under starvation, body would be unable to perform work (law of energy conservation), and organs would fail. Ultimately, star

If fat were deposited and not burnt under starvation, body would be unable to perform work (law of energy conservation), and organs would fail. Ultimately, starving people would be dying fat. But we know this is not the case. Starving populations are very skinny. This is not to say that starvation is healthy, only that starvation is a reliable, affordable, and obvious way to lose weight.