Mushroom behind 'tiny people' hallucinations identified
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People in communities thousands of miles apart have described the same strange experience after eating a mysterious mushroom: vivid visions of tiny humans moving through and interacting with the physical world around them. Known as Lilliputian hallucinations—a reference to the 6-inch-tall inhabitants of "Gulliver's Travels"—the phenomenon has long been thought to stem from cultural influences rather than biology.
Using DNA sequencing, University of Utah (U) researchers confirmed that a single mushroom species, Lanmaoa asiatica, is responsible for these hallucinations in Southwest China and the northern Philippines.
They also discovered that the mushroom contains none of the psychoactive compounds known to science, including psilocybin. Instead, the findings point to an entirely new hallucinogenic compound that could offer new insights into neurological disease and how the brain shapes perception and consciousness.
Colin Domnauer, a doctoral student at the U, and Bryn Dentinger, a mycologist at the U and the Natural History Museum of Utah, coauthored the study that was published June 5, 2026, in the journal Mycologia .
Domnauer spoke to @theU about the Lilliputian mushroom, the decades-long mystery behind it and the implications of a new hallucinogenic compound.