When you're 7'1", "320-380" (LOL) you can pretty much do what you want, especially on the court.
Other centers are taller than him. They need to be eating some of those "Shaq packs" as well. You cant be a dominate force when you're 6'11", 225. I'd say Shaq doesnt juice, but if I was one of the smaller centers around the league, I'd definitely be doing it in the off-season to try to get to around 300. Bigger people and people who arent scared have less trouble with Shaq. For those that think he sucks, despite the weaknesses in his game (many big men have similar weaknesses) he has done everything he needs to do already. Won championships, MVP awards, etc. Not to mention he's got a mansion and multiple cars paid for and has enough money he never has to do a thing again. Now its just stackin up those chips and trophies and shooting for records.