clenbuterol

Since clenbuterol is not a substance naturally produced by the human body, there is no level below which you get a pass.

The Explainer: Say it ain’t so, Alberto 2010

But under the World Anti-Doping Code, clenbuterol is banned entirely.

The Explainer: Why clenbuterol? 2010

The UCI seems to be giving Contador the benefit of the doubt and has said that the case warranted “further scientific investigation” because the Cologne laboratory which detected the clenbuterol is known to be able to detect the tiniest traces of drugs.

Alberto Contador says he may quit cycling if banned for doping 2010

Mr. Vidarte says clenbuterol is given to cattle in Europe and could have seeped into his food and triggered the positive test.

Tour Winner Tests Positive for Banned Drug Reed Albergotti 2010

Like salbutamol, clenbuterol is a Beta2 adrenergic agonist, which relaxes those smooth muscle groups over which you exercise no direct conscious control.

The Explainer: Why clenbuterol? 2010

A banned substance which can be used to help lose weight and help breathing, clenbuterol is also known to boost performance by helping to increase muscle-to-fat ratios, which is why it is sometimes illegally used by meat producers.

Alberto Contador on doping report: Sad and disappointed, but with my head held high 2010

However, the actual effects of long-term clenbuterol intake on performance, muscle power, and overall health have been unclear.

Army Rumour Service 2010

There are reports that clenbuterol, which is used to fatten cattle before slaughter, continues to be administered illicitly by some ranchers in Spain.

Basque officials insist their beef is clenbuterol-free 2010

Contador registered a minute trace of clenbuterol, which is listed as a zero-tolerance drug by WADA, from a test taken on a rest day at last year's Tour.

Contador Escapes Doping Ban AP 2011

Contador is reported to have tested positive for a minute amount of a substance named clenbuterol, which is said to reduce fat, increase muscle mass, and assist breathing.

James Moore: Livestrong or Livewrong? James Moore 2010