Yep, poppy seeds may contain residual minute traces of opiate alkaloids, not enough to have an effect on the body, but sufficient to cause positive drug test results. So that episode of Seinfeld where Elaine tests positive for opium could in fact happen to an unsuspecting poppy seed bagel eater. This pack of poppy seeds contains 458,750 poppy seeds. I have individually numbered each one to aid in arranging them in a line. Such a single-file line of poppy seeds would stretch for more than 5m! That's longer than some pieces of string - & thinner too!