SPECIALTY TOPICS · GUIDE
What Is Microdosing?
A plain definition of microdosing with natural psilocybin mushrooms and truffles, why there is no agreed scientific definition, and what research says so far, with no amounts or schedules.
Content last updated . This page has not been medically reviewed.
Back to Psychedelic TherapyThis page explains the term only. It does not give amounts, schedules or methods, and nothing here is advice to try it. Where the page names an evidence level, the labels are approved medicine, promising but limited, mixed, insufficient evidence and no good evidence of benefit.
Which substances this guide covers
This guide is about natural sources only. Psilocybin is the compound found in so-called "magic mushrooms" and in psilocybin truffles. [2] A mushroom or truffle is a natural source, not a measured product, so what is inside can vary. Reviews of the research now look at mushroom and truffle microdosing on its own. [5]There is no agreed definition
Microdosing is a popular term, not a medical one. A 2019 expert overview in the Journal of Psychopharmacology stated that there is no agreed scientific consensus on what microdosing is. [4] Studies have used different preparations and schedules, and a 2026 systematic review of psilocybin mushroom and truffle studies described extreme heterogeneity across protocols and preparations. [5] That is one reason results from different studies are hard to compare.Why people say they do it
NIDA reports that people say they microdose to lessen mental health symptoms such as depression and stress, improve productivity and ease pain. [3] The page Microdosing Claims: Productivity, Creativity, Mood and Cognition checks each of these claims against the research.How it differs from clinical psychedelic treatment
In clinical research, psychedelic-assisted therapy uses full-strength sessions with professional support. NIDA describes a typical approach as one to three sessions combined with counseling. [3] Microdosing is a different pattern, often self-directed and repeated over time, and the results of clinical trials do not carry over to it. The page Microdosing vs Clinical Treatment sets out the contrast.What research shows so far
NIDA states that research to date has not established whether microdosing is safe or effective. [3] A 2026 meta-analysis of studies in healthy adults found no consistent immediate benefits for depressive, anxiety or stress symptoms, and called the evidence from randomized trials inconclusive. [6] A 2026 systematic review of psilocybin mushroom and truffle microdosing rated the certainty of the evidence as low. [5]- Benefit for healthy adults: mixed, with controlled trials mostly showing little difference from placebo. See Human Microdosing Research.
- Long-term safety: insufficient evidence. See Long-Term Safety Uncertainty in Microdosing.
Frequently asked questions
Does microdosing cause hallucinations?
NIDA describes microdosing psilocybin as taking an amount low enough that people do not experience hallucinogenic effects. [2] Studies still find that low amounts can produce noticeable subjective effects in some people, so "no effect" is not a fair description either. [8]
Is microdosing an approved treatment?
No. Research to date has not established that microdosing is safe or effective. [3]
Is microdosing the same as psychedelic therapy?
No. Clinical psychedelic therapy uses full-strength sessions with trained staff, whereas microdosing is often self-directed and repeated over time. [3] Evidence from one does not prove the other.
Why can't this site tell me an amount?
Because there is no agreed definition and no established safe or effective amount, and because this library gives education only, not use instructions. [4] A prescriber or clinical trial team is the right place for any question about a specific substance.
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Law, safety and quality
References
- Szigeti B, et al. eLife 2021. Self-blinding citizen science to explore psychedelic microdosing Read 2026-10-22.
- National Institute on Drug Abuse (NIDA). Psilocybin (Magic Mushrooms). Read 2026-10-22.
- National Institute on Drug Abuse (NIDA). Psychedelic and Dissociative Drugs as Medicines. Read 2026-10-22.
- Kuypers KP, et al. Journal of Psychopharmacology 2019. Microdosing psychedelics: More questions than answers? An overview and suggestions for future research Read 2026-10-22.
- Page, et al. Frontiers in Psychiatry 2026. The subtle science: a systematic review of psilocybin magic mushroom and truffle microdosing Read 2026-10-22.
- Meshkat S, et al. CNS Drugs 2026. Efficacy and Safety of Psychedelic Microdosing on Psychological Outcomes in Healthy Adults: A Systematic Review and Meta-analysis Read 2026-10-22.
- Jorgenson DM, et al. Clinical Toxicology 2026. Psychoactive mushroom edibles: trends and toxicities reported to the United States National Poison Data System, 2023-2024 Read 2026-10-22.
- Cavanna F, et al. Translational Psychiatry 2022. Microdosing with psilocybin mushrooms: a double-blind placebo-controlled study Read 2026-10-22.