How does Anthony Bourdain eat that much and yet look like this?
Okay, so he's surely not eating as much day to day as he does in front of the camera for tapings of his show. But, my god, for a guy who earns his living off of his own cooking and sampling the cuisine of others (including some very rich offerings), he must workout like a madman!
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Hi, this is my first post of my own.
In response to your question: he quit smoking when his daughter was born. On the other hand nicotine is a nervous-system stimulant and can indeed cause not only the airways, but also the oxy receptors in the lungs to open further. While I'd never recommend it, a well-timed cigarette can advert an asthmatic episode. 
And the sober bartenders
His prodigious drinking consumption is what is even more amazing! 
Takes after our maternal grandfather and his sons, who also ate very heartily and never had an extra ounce of fat on them. I take after my dad's side of the family and have to work my butt off, quite literally. 
It kicks the metabolism into high gear.....that's where the " munchies " comes from. He's never boasted about being a "pot-head," but he has hinted at it over the years, and I do remember him partaking on at least one episode of "No Reservations." He has put the bulk of his alcoholism behind him, and he has given up cigarettes. Marijuana has been well documented to be a much healthier alternative to either, and especially both.
I'm sure it helps the many miles he's hiked in the wilderness between meals in every episode.....
