Lots of water I guess. Or else diuretics wouldn't have fixed it. A few times he was in insane condition, but those times he almost died... thanks to Milos he didn't. 

that pic was before he started working with Milos tho.
he was much bigger with Milos, but seems like he loved his slin because he would get puffy as fuck !
I'd show you some pictures if Milos's site wasn't shut down :p