“Poppy seeds don’t have nearly enough opiates to intoxicate you,” according to an article published by the University of Florida’s College of Medicine. “But because drug tests are exquisitely sensitive, consuming certain poppy seed food products can lead to positive urine drug test results for opiates – specifically for morphine, codeine or both.”

Countries in East Asia often have very strict anti-drug rules and long jail sentences for offenders. Singapore, for example, still uses the death penalty for drug trafficking offenses, including for marijuana.