Is that true? I heard that a Conte athlete could beat the tests until better testing came around.
drug testing is a cat and mouse game.
new drugs are designed, then a year later they are added to the banned list
adding a polymer to an existing steroid may slightly affect it's efficacy, but raise the toxicity a bunch
the new 'drug' will be detected, but if it's not on the banned list yet, the athlete is deemed 'clean'.