What does diet have to do with getting shredded as a pro?!
You know it's interesting that gh15 would claim that constant use of hormones and GH coupled with a semi-clean diet is responsible for pro-level conditioning, while Nasser has gone on record in one of his bodybuilding.com interviews saying that there were periods of time precontest when he was so depleted from the diet that he actually lacked the energy to tie his shoes or get dressed by himself. Don't let either one of "them" mislead you too far one way or the other; I'm guessing the truth is probably somewhere in between. Just something to think about.