>5. Eating a poppy seed bagel mimics opium use
Average Rating: 3.5
This one is absolutely true. There are documented cases. Also, I hate to cite Mythbusters as it's not entirely scientific, but on the show they took a drug test, passed, ate a poppyseed bagel, took the same drug test, and failed. Seems pretty conclusive to me. But I know there are other documented cases besides that.