Perhaps an injustice has been committed?
It appears meat eaters in some parts of the world may have low levels of this drug in their system most likely due to the lax standards their respective governments impose at the "meat incorporated" plants residing in their respective countries.
From BBC News:
"... Clenbuterol is a powerful drug used to treat asthma, but it can also help build up lean muscle mass and burn off fat.
The drug's growth-promoting ability has also found favour with beef farmers, particularly in China and Mexico.
The fact that humans can ingest the substance inadvertently by eating beef is putting pressure on Wada's rules, which deem the slightest trace to be a doping infringement. ..."