According to this anonymous professional, no health problems exist in any of the Mr. Olympia (largest annual and most competitive bodybuilding competition in the world) today. Just recently, Mike Matarazzo sustained a serious shoulder injury and Fukes (both well-known professional bodybuilders) blew out both of his knees but neither were from the use of steroids. I know of no ex-pro bodybuilders that are having health problems as a result of using steroids. The media (and government) will tell you all kinds of horror stories, but conveniently leave out the fact that the people having health problems were also mind-altering drug users.
Unfortunately there exists no test that can determine a bodybuilder's detailed drug use in the far past, and doping test results are very easy to manipulate . Therefore, if you really want to know whether a bodybuilder is true natural, or which drugs he has been using to build his physique, you will have to ask him. The standard answer to this question is, however, always "No, I have never used any drugs". However, if you get to know the guy better, develop some friendship, give him some complements on his physique, and especially if he thinks that you are a drug user yourself or interested in becoming one, he might well loosen up and start telling you at least part of his true story.