http://sports.aol.com/news/articles/_a/doping-experts-say-steroids-found-in/n20061001110409990004
About 15 percent of non-hormonal supplements such as vitamins, minerals and creatine contained forbidden anabolic steroids that were not listed on the labels
About 15 percent of non-hormonal supplements such as vitamins, minerals and creatine contained forbidden anabolic steroids that were not listed on the labels