Where does fat/muscle go after it is lost?

Question

I understand at a very basic level that when we lose weight, our bodies burn fat stores for energy. But since we don’t have a little fire actually going on in our bodies, where does this fat go? How do we ‘excrete’ these pounds and pounds of fat and not ever see where it goes? Same thing with atrophied or “lost” muscle – where does it go?

In: 0

Answer 1

in the case of fat, you breathe it out. it gets converted into carbon dioxide, and it gets breathed out into the air.

And you produce some water too, so that just gets added to the rest of the water in your body. eventually it is lost in sweat or urine.