Dal sito dell'USADA. Visto che lì le mucche possono prendere lo zeranolo, è ovviamente possibile che un atleta mangi qualcosa di contaminato.
The risk of a positive doping test from meat contaminated with zeranol is remote. In the U.S., USADA has only seen the single positive test due to zeranol in more than sixteen years.
However, in the event of any positive test for zeranol, we will work diligently with the athlete, as we did in the most recent case, to thoroughly evaluate whether the positive test may have come from zeranol contamination.