There is supposedly an interview in which Larry was asked if he used (dianabol), to which he very candidly replied, "Yeah... doesn't everybody?"
I've never seen or read this particular interview, but whether his reply was delivered seriously or tongue-in-cheek, I suspect it is a subtle admission at the very least.
Regardless, Larry wasn't doing anything that was off limits to his competition. And, I still believe that what set him apart was a combination of having Vince and Blair behind him, his own work ethic, and a tremendous genetic response to the training, nutrition, and supplements (including d-bol).