No more poppy seed muffins

From "Mythbusters" on Discovery Channel: Opiate drugs, such as heroin, morphine and codeine, are made from the seeds of opium poppies. The poppy seeds used in baked goods often come from the same or a similar type of poppy. While the amount you'd typically consume would be too small for you to feel the effects, it can produce a positive result in a urine drug test. Several people have lost their jobs solely because they ate a poppy-seed muffin or bagel for breakfast before taking a drug test. As a result, the test is being revised to account for this eventuality.