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So what actually happens to FAT when you lose it?

Has anyone else ever wondered what happens to the fat in our body as we lose it?

Or am I the only one crazy enough to think about that ….

I mean people say “melt your fat away” but what does that mean …. Does it that mean we sweat it out or pee in out?


So because the question was keeping me up I decided to google it - as you do in the middle of the night!

And I found a really interesting (though somewhat technical) article in the British Medical Journal (you can read it HERE) and actually most of the fat is lost when EXHALING CARBON DIOXIDE … say what!


Fat is a combination of carbon, hydrogen, oxygen.

So, when you break down fat, the molecules arrange themselves as:

  • Carbon dioxide – CO2 (one carbon with two oxygen atoms)

  • Water – H2O (Two hydrogens and one Oxygen atom)


According to the article:

If you follow the atoms in 10 kilograms of fat as they are ‘lost’, 8.4 kilograms are exhaled as carbon dioxide through the lungs. The remaining 1.6 kilograms becomes water, which may be excreted in urine, faeces, sweat, breath, tears and other bodily fluids, the authors report.

WOW mind blowing right!

So according to their findings:

To oxidize ten kilos of fat you need to inhale 29 kilos of oxygen. This produces 28 kilos of carbon dioxide and 11 kilos (24 pounds) of water.


So what does this mean for us ….

Well when you perform exercise such as brisk walking, cycling, or HIIT workouts you inhale more oxygen (and breath out more carbon dioxide) than you would if sitting in front of a computer or TV.

So being active is IMPORTANT for fat loss


So keep your body moving and stay active for a healthier leaner body weight.

If you're ready to burn more fat join me for one of my next challenge groups. Message me to find out more!


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