What Is Microdosing?

The short answer

Microdosing means regularly taking very small amounts of a psychedelic substance, with the aim of getting benefits without the strong effects of a full dose. Researchers describe it as the practice of regularly using low doses of psychedelic drugs. [1] The U.S. National Institute on Drug Abuse (NIDA) describes it for psilocybin as regularly taking a very small amount of a hallucinogenic substance. [2]

This 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 people mean

NIDA says people who report microdosing typically mean LSD or psilocybin. [3] Psilocybin is the compound found in so-called "magic mushrooms". [2] LSD is a separate compound. They are different substances, and a mushroom is a source organism, not a measured product. Reviews of the research keep these apart because the findings for one cannot simply be applied to the other. See Psilocybin vs LSD for how they differ.

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 substances, 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 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.
• Approved medicine: none. Microdosing is not an approved treatment. NIDA says only esketamine, a different substance and not a microdose, is FDA approved for therapeutic use among these drugs. [3]

Law, safety and quality

Laws on these substances differ by place and change over time. This is not legal advice; see Psychedelic Legal Status by Country for how law differs by place. Products sold as mushroom edibles are often unregulated and may have unlisted ingredients. [7] If a child or adult has swallowed an unknown mushroom product and seems unwell, call 911 or US Poison Help at 1-800-222-1222. For a crisis involving thoughts of self-harm in the US, call or text 988.