Poppy seeds are an oilseed obtained from the opium poppy (Papaver somniferum) and infamously linked with the psychedelic opium. That substance however is only derived from the seedpods of unripe poppies through a dried extraction method. Otherwise the kidney-shaped seeds are safe for consumption and widely used around the world, especially in bread and pastry, or pressed to yield poppyseed oil. However unwashed poppy seeds in large amounts can be used to brew tea that gives its drinker a similar effect as opioids.
In this case study, the author not only highlights numerous cases of poppy seed dependence but also looks at how easily the ingredient is available for commercial purchase.