The most notable is lactucarium, often referred to as lettuce opium. This milky white substance, found in lettuce stems, contains lactucin and lactucopicrin, both of which have sedative and pain ...

While lettuce does contain trace amounts of lactucarium (a mild sedative-like compound), the concentration is too low to have a meaningful impact. Article continues below The Science: Establish a ...

Burgess Pet Care is busting bunny "myths" during its Rabbit Awareness Week, said the Daily Star, highlighting that the leafy green contains lactucarium – dubbed "rabbit opium" – which promotes ...