Accidental Troll

It's called "ketosis" -- the process of turning stored into ketones for fuel -- and it's usually more associated with people who go on the low-carb to force their bodies to start it up. But burning ketones leaves behind acetone, which then has to be excreted through either the lungs or the kidneys.

So while José's breath may be off, he can remove his nailpolish by pissing on his hands.