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Can eating steak make you fail a drug test?

Tour de France champion Alberto Contador is blaming his positive doping test on bad steak -- and experts are backing him up, the Associated Press is reporting.

The test spotted clenbuterol in the cyclist's system, a drug that's long been used by bodybuilders to increase muscle mass and reduce fat. Clenbuterol also boosts energy -- actually, the drug's short-term effects are similar to amphetamine drugs.

But the drug is also given to cows, chickens and pigs, to hurry up the animals' growth before we eat them, and that's why some sports medicine experts are siding with Contador. Anyway, he would've had to eat "vast quantities of meat" for the drug to have had an affect on his performance, Dr. Andrew Franklyn-Miller, a sports medicine expert at the Centre for Human Performance in London and a team doctor for Britain's rowing team, told AP.

Good to know.