It's supposition, obviously. If it makes you happy to believe that your friend is a magical hero who doesn't do what virtually every other athlete does to compete at a world class level, great. The world needs people like you to sell things to.
I was hoping you had some actual information about the situation. Oh well. The wiki entry on doping(most notably the survey on steroids from '84) point to there being a very high rate of drug use, and I would expect those trends to continue with newer drugs. I'm just having a hard time finding anything useful about the situation today. I did find this quote from 72 in the wiki very amusing.
"A medical research team in the United States attempted to set up extensive research into the effects of steroids on weightlifters and throwers, only to discover that there were so few who weren't taking them that they couldn't establish any worthwhile comparisons."