[danielf]

Originally Posted by denphone

On the Clenbuterol traces found in his urine l have experience of Clenbuterol myself as when my heart function was 20% this drug has been used very recently in conjunction with a heart assist device on patients with heart failure to stimulate muscle regeneration and from my experience danielf l believe he knew exactly what he was doing and for him to say he accidentally ingested it is just nonsense.

It's not nonsense. Clenbuterol is used (illegally) to enhance meat production in livestock.

Just have a look here

An outbreak of positive tests for the anabolic steroid clenbuterol at this summer’s under-17 football World Cup in Mexico has raised doubts about the reliability of previous doping violations for the same substance, including that of British hurdler Callum Priestley.


Fifa has revealed that an astonishing 109 positive tests were recorded for the banned drug out of 208 urine samples taken during the tournament.
The statistics are so extraordinary that both Fifa and the World Anti-Doping Agency (Wada) have confirmed they will not be prosecuting any cases, blaming the failed tests on contaminated meat.

I don't know all the details of the Contador case, but he certainly wouldn't be the first one to test positive due to contaminated meat.