Efficacy and Safety of Psychedelic Microdosing on Psychological Outcomes in Healthy Adults: A Systematic Review and…
The randomised evidence shows microdosing performing no better than placebo for depression, anxiety, or stress — what treatment with an actual demonstrated effect should I be trying first?
Well-supported by good-quality research. how we score evidence
Caveat on this rating: The meta-analytic estimates rest on very little randomised data — two parallel RCTs (three comparisons, n=117) for efficacy and two RCTs (n=109) for adverse events — so the confidence intervals are wide and the review is better read as demonstrating absence of evidence than proving absence of effect. Several authors are affiliated with psychedelic research centres and one is chief medical officer of a psychedelics company (disclosed), so the null result is not coming from sceptics.
The substances used for microdosing are federally illegal.
The most recent synthesis — 24 studies and 3,681 participants, searched to February 2026 — found that in randomised trials microdosing produced no clear reduction in depressive symptoms (SMD -0.19, 95% CI -0.56 to 0.19), anxiety (SMD -0.20, -1.11 to 0.71), or stress (SMD 0.02, -0.39 to 0.43), with adverse-event rates similar to control. Observational studies reported mood and personality improvements, which the authors attribute to expectancy and lifestyle factors rather than drug effect.
Worth asking
The randomised evidence shows microdosing performing no better than placebo for depression, anxiety, or stress — what treatment with an actual demonstrated effect should I be trying first?
Source
Efficacy and Safety of Psychedelic Microdosing on Psychological Outcomes in Healthy Adults: A Systematic Review and Meta-analysis. — Meshkat S, Leung M, Meshkat S, et al. (2026)
Reputable peer-reviewed journal
Read the source: https://doi.org/10.1007/s40263-026-01325-5
DOI: 10.1007/s40263-026-01325-5
How this was scored
- Study design
- Systematic review of randomised trials
- Funding
- Funding not disclosed
- Published in
- Reputable peer-reviewed journal
- Sample size
- 3,681
- Preregistered
- Yes
- Conflicts disclosed
- Yes
- Independent of proponent
- No
- Retracted
- No
Read the full scoring rubric, including what it can't tell you.
Published August 19, 2026.
Where we put this study in context
Questions
How strong is the evidence behind this?
Resolv rates this source "strong evidence". Well-supported by good-quality research. It scores 72 out of 100 on our published rubric. One caveat travels with that badge: The meta-analytic estimates rest on very little randomised data — two parallel RCTs (three comparisons, n=117) for efficacy and two RCTs (n=109) for adverse events — so the confidence intervals are wide and the review is better read as demonstrating absence of evidence than proving absence of effect. Several authors are affiliated with psychedelic research centres and one is chief medical officer of a psychedelics company (disclosed), so the null result is not coming from sceptics. The score is calculated from recorded facts about the source — study design, funding, publication venue, sample size, preregistration — not typed in by an editor.
What is the source for this?
Efficacy and Safety of Psychedelic Microdosing on Psychological Outcomes in Healthy Adults: A Systematic Review and Meta-analysis. — Meshkat S, Leung M, Meshkat S, et al. (2026). Published in: Reputable peer-reviewed journal. DOI: 10.1007/s40263-026-01325-5. The full source is linked on this page so you can read it yourself.
Who paid for this research, and does that matter?
Study design: Systematic review of randomised trials. Funding: Funding not disclosed. The researchers were not independent of whoever benefits from the result. Industry sponsorship is one of the most reliably measured biases in medicine, which is why funding carries real weight in the score rather than sitting in a footnote.
Is microdosing, microdose, lsd microdosing, psilocybin microdosing, sub-perceptual dosing FDA approved for this use?
No. Its current status is: Not FDA-evaluated for this use. The substances used for microdosing are federally illegal.
Is this medical advice?
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.