Tour de France winner's positive drug test
Queen’s University professor Brendon Gurd is available to talk about the positive drug test of three-time Tour de France champion Alberto Contador.
Contador blamed bad meat for the reason Clenbuterol was found in his body. Professor Gurd, who works in the Queen’s School of Kinesiology and Health Studies, says the cyclist’s excuse may be true.
“Given the extremely low concentration of Clenbuterol found in Contador’s sample it seems feasible that this may have occurred via food contamination. Clenbuterol is used in livestock to improve feed efficiency and carcass leanness (i.e. feed animals less and have more meat at slaughter),” says Professor Gurd. “There is considerable residue of Clenbuterol in tissues taken from cattle, sheep and pigs that have been fed dietary Clenbuterol. This supports the contention that humans could be exposed to Clenbuterol by eating meat from an animal that had been administered dietary Clenbuterol.
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