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

Our body converts them into water and carbon dioxide that enters the blood stream. We pee out the excess water, and the carbon dioxide ends up in our lungs and gets exhaled out of our body. It seems weird, but we breathe and sweat and pee out what is left of the fat after it gets turned into energy.