[The whole see-through 3D body, the camera turning slowly round it. A warm yellow glow spreads over the belly, with a label: "fat".]
Lose ten kilos of fat. Where does it all go?
[Yellow drops leave the belly and travel through the blood, up to the heart.]
Your body breaks it down, and your blood carries it away.
[The camera dives to the lungs. They light up, and drops stream up the windpipe and out of the mouth.]
And most of it leaves your body through your lungs.
[A big number counts up: "8.4", with the words "kg breathed out".]
Eight point four kilos, breathed out as carbon dioxide.
[The camera turns round behind the body. Light-blue drops run from the kidneys down to the bladder, which fills. A label: "water".]
The other one point six kilos turn into water, and leave the way water does.
[Back to the whole body, from the front. The lungs glow with each breath out.]
Fat doesn't just vanish. You breathe most of it out.