Read that before. I think it says that Sergio (since he didnt even know there was an interview - ghost written) took some deca once or twice, but was late in career and had no bearing on his development. Shit, it may have hampered him.
Pearl also only took .25mg dbol a day, just before he retired, and had to have an exorcism to remove the demons, apparently.
Larry Scott, same shit, apparently he took 5mg dbol a day after he retired, hated the "false" pumps he was getting, and took the straight and narrow path.
Sergio, obviously, much like Ronnie, had the genes to grow by just training and eating garbage, and looking better than most juicers whilst natural, before they start aas. Thats genetics, what can you do...?