Zirbel denies knowingly taking it... if he did take it he may have been boosting his immune system. Any other theories?
Zirbel Announces Positive For DHEA | Cyclingnews.com

Zirbel Announces Positive For DHEA | Cyclingnews.com
Tom Zirbel has announced he tested positive in an anti-doping test conducted by the United States Anti Doping Association (USADA) following the US Pro time trial championships on August 29, 2009. The A-sample returned positive for an endogenous steroid Dehydroepiandrosterone (DHEA). Zirbel awaits the response of the B sample.



