I’ve heard you literally poo and wee it out
In: Biology
When you lose 10 kg, 8.4 kg comes out of your lungs (i.e. you breath it out as CO2) and 1.6kg comes out as water
Ruben Meerman (better known to Aussie kids as the Surfing Scientist) gave a great and engaging talk on this
[https://www.youtube.com/watch?v=nM-ySWyID9o](https://www.youtube.com/watch?v=nM-ySWyID9o)
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