Toward Better Identification Of Substances Used For Doping In Sports

... Athletes who use performance-enhancing drugs try to get around anti-doping rules by turning to "designer steroids" -- drugs that are not on the list of banned substances, and off the testers' radar screen. In one recent high-profile case, world-class sprinters used the new steroid tetrahydrogestrinone (THG) for months until an informant sent a sample to antidoping authorities. ...