The I.O.C. also recently unveiled two tests for a previously undetectable drug, erythropoietin, or EPO, which enhances endurance.
According to Arnold, Victor Conte contacted him in 2000 seeking undetectable drugs.
An unnamed, high-profile track coach this summer identified international and American track and field athletes who he said were utilizing an undetectable performance-enhancing drug.
If people were synthesizing steroids from arcane literature published 40 years earlier, Dr. Catlin reasoned, they might also be designing undetectable drugs.
Suppose there were a completely undetectable drug that enhanced performance in the 100-meter dash.
Some veterans at the track are convinced that Gill is using unscrupulous means, perhaps illegal and undetectable performance-enhancing drugs, to win so many races.
The murder weapon: a rare, usually undetectable date-rape drug with the street value of a quarter of a million dollars.
R. Richards Rolapp, president of the American Horse Council, said that undetectable drugs are "widely used," and called drugging "the battleground for the integrity of racing."
As the number and sensitivity of drug-screening tests increases, athletes discover new, undetectable drugs or combinations of drugs, or other ways of avoiding being caught.
THG was discovered by drug-testing officials during the summer after an anonymous track coach said that international and American track and field athletes were using an undetectable performance-enhancing drug.
