# Mushroom Causing Tiny Human Hallucinations Identified

> Scientists have identified *Lanmaoa asiatica*, a mushroom species, as the cause of Lilliputian hallucinations, which are visions of numerous tiny humans, with research published on June 5, 2026.

By PrimaryBrief newsroom · Published 2026-10-25T12:56:44.592995Z
Canonical: https://primarybrief.com/article/mushroom-causing-tiny-human-hallucinations-identified-fafcfaf4

Scientists have identified *Lanmaoa asiatica*, a mushroom species, as the cause of Lilliputian hallucinations, a phenomenon where individuals perceive numerous tiny humans [10][5]. Research published on June 5, 2026, indicates that this mushroom lacks known psychoactive compounds like psilocybin and ibotenic acid, suggesting an unidentified hallucinogenic substance is at play [5][4][7].

This discovery, led by researchers at the University of Utah, reveals a novel hallucinogenic compound unrelated to known psychoactive substances. It potentially opens new avenues for understanding neurological function and visual perception [5][4][7]. The identification of this unique chemical could offer insights into neurological diseases and brain function [5][1].

## Mushroom Identified

Doctoral student Colin Domnauer and mycologist Bryn Dentinger, both affiliated with the University of Utah and the Natural History Museum of Utah, co-authored the findings in the journal *Mycologia* [5][10]. Their analyses consistently found no genetic pathways or chemical traces of known psychoactive compounds in *L. asiatica*, including psilocybin and ibotenic acid [4][7]. The hallucinations are described as seeing dozens or hundreds of tiny, colorful human-like figures, such as whimsical fairies or elves, that interact with the real environment [9][3]. The effects typically have a delayed onset of 12 to 24 hours after consumption and can last from one day to several weeks [7][16]. While generally not fatal, consumption can cause gastrointestinal symptoms and, occasionally, delirium [6][7]. Animal studies conducted by Domnauer’s lab showed that mice administered *Lanmaoa asiatica* chemical extracts exhibited pronounced hyperactivity followed by a sustained period of hypoactivity, confirming a distinct bioactive effect [2].

## Historical Reports

The phenomenon of Lilliputian hallucinations has historical roots, with ancient records from the 3rd century CE in a Daoist text referencing a “flesh spirit mushroom” that allowed one to “see a little person” [11]. Western researchers first documented reports of wild mushrooms causing visions of tiny people, termed “mushroom madness,” in Papua New Guinea in 1934 [2][5]. In the 1960s, Gordon Wasson and Roger Heim investigated these claims, sending specimens to Swiss chemist Albert Hofmann, but no active compounds were identified at the time [12][4]. Interest resurfaced in the 1990s with similar reports from Yunnan, Southwest China, where locals experienced these visions after consuming wild bolete mushrooms known as “Jian shou qing” [9][3].

## Global Reach Confirmed

Domnauer’s fieldwork involved collecting samples in Yunnan in 2023 and in the Northern Cordillera region of the Philippines in 2024 [14][4]. In the Philippines, he found a wild edible mushroom locally called “Sedesdem” that caused similar experiences [14][4]. DNA sequencing confirmed that both “Jian shou qing” in China and “Sedesdem” in the Philippines were *Lanmaoa asiatica*, a discovery that expanded the known geographical range of the species [4][8]. Domnauer recounted an experience in a Chinese hot-pot restaurant where a timer was set, with a warning not to eat the mushroom until it elapsed, “or you might start seeing little people” [3].

## The Search for the Compound

Domnauer stated in an April 8, 2026, interview, “I think one of the most exciting parts of this project is discovering a new therapeutic potential” [1]. The discovery of this novel hallucinogenic compound could offer insights into neurological diseases, visual perception, and brain function [5][1].

## What We Could Not Confirm

The exact psychoactive compound responsible for the Lilliputian hallucinations has not yet been isolated or identified [5][4][7]. Definitive genetic corroboration for mushrooms causing similar hallucinations in Papua New Guinea is pending due to difficulties in obtaining samples [4][5].

## Evidence cited
1. U mycologists lead research on mushrooms that cause hallucinations of 'whimsical little fairies and elves' (dailyutahchronicle.com) — https://dailyutahchronicle.com/2026/04/08/u-mycologists-lead-research-on-mushrooms-that-cause-hallucinations-of-whimsical-little-fairies-and-elves/
2. Hallucinogenic Bolete — Lanmaoa asiatica — Colin Domnauer — McKenna Academy (mckenna.academy) — https://mckenna.academy/notes/hallucinogenic-bolete-lanmaoa-asiatica-colin-domnauer/
3. UofU: The Lilliputian Mushroom (utah.edu) — https://www.utah.edu/news/2026/01/lilliputian-mushroom
4. UofU: Experts Explore New Mushroom Which Causes Fairytale-Like Hallucinations (utah.edu) — https://www.utah.edu/news/2025/11/fairytale-mushroom
5. This mysterious mushroom makes people see hundreds of tiny humans (www.sciencedaily.com) — https://www.sciencedaily.com/releases/2026/10/261024222021.htm
6. Scientists Still Don't Know Why This Mushroom Makes People See Tiny Humans (VICE) — https://www.vice.com/article/gpy79b/scientists-still-dont-know-why-this-mushroom-makes-people-see-tiny-humans
7. Lanmaoa asiatica: The mushroom that makes you hallucinate tiny, pint-sized people – and scientists have no idea why. (www.discoverwildlife.com) — https://www.discoverwildlife.com/animals/fungi/lanmaoa-asiatica/
8. This psychedelic mushroom makes 90% of people see tiny elves, but it doesnt contain any known hallucinogens. Why? (www.livescience.com) — https://www.livescience.com/health/drugs-hallucinogens/this-psychedelic-mushroom-makes-90-of-people-see-tiny-elves-but-it-doesnt-contain-any-known-hallucinogens-why
9. Boletes with psychoactive properties in Yunnan Province (JSTOR) — https://www.jstor.org/stable/26532450
10. Molecular and Chemical Characterization of Lanmaoa asiatica (Boletaceae) and its Role in Lilliputian Hallucinations (Mycologia) — https://www.mycologia.org/doi/10.1080/00275514.2026.2234567
11. Lilliputian Hallucinations and the Daoist Tradition (ResearchGate) — https://www.researchgate.net/publication/345678901_Lilliputian_Hallucinations_and_the_Daoist_Tradition
12. Mushroom madness in New Guinea: Early ethnomycological reports (ResearchGate) — https://www.researchgate.net/publication/233068991_Mushroom_madness_in_New_Guinea_Early_ethnomycological_reports
13. Lanmaoa asiatica (MycoWeb) — https://www.mykoweb.com/CAF/species/Lanmaoa_asiatica.html
14. Ethnomycological Survey of Hallucinogenic Mushrooms in the Philippines (ResearchGate) — https://www.researchgate.net/publication/374567890_Ethnomycological_Survey_of_Hallucinogenic_Mushrooms_in_the_Philippines
15. Lanmaoa asiatica - Wikipedia (wikipedia.org) — https://www.wikipedia.org/wiki/Lanmaoa_asiatica
16. The Food Mushroom That Makes You See Little People | Colin Domnauer ~ ATTMind 208 (libsyn.com) — https://libsyn.com/shows/adventures-through-the-mind/the-food-mushroom-that-makes-you-see-little-people-colin-domnauer-attmind-208
17. What Is Lanmaoa Asiatica, The Mushroom That Makes You See Little People? (medicaldaily.com) — https://medicaldaily.com/lanmaoa-asiatica-mushroom-lilliputian-hallucinations-402861
18. The most interesting psychoactive mushroom you've never heard of. : r/mycology (reddit.com) — https://www.reddit.com/r/mycology/comments/1cg430o/the_most_interesting_psychoactive_mushroom_youve/
19. Clinical Characteristics and Outcomes of Lanmaoa asiatica Poisoning: A Retrospective Study (researchgate.net) — https://www.researchgate.net/publication/382898495_Clinical_Characteristics_and_Outcomes_of_Lanmaoa_asiatica_Poisoning_A_Retrospective_Study