depressionFull doseFullModerate evidence

Two sessions, and most participants halved their depression

Two sessions, and most of the group cut their symptoms in half.

2021Published
Randomised waiting-list controlled trialStudy type
27 peopleSample
What our evidence ratings mean

What they did

Twenty-seven adults with major depressive disorder were randomly assigned to receive two psilocybin sessions with supportive therapy either immediately or after an eight week delay.

What they found

Depression scores fell steeply in the treated group, with 71 percent showing at least a 50 percent reduction in symptoms at both one week and four weeks after treatment.

71%halved their symptoms
2dosing sessions

Worth knowing

A waiting list is not a placebo. People who know they are being treated while others wait tend to improve more, and this design cannot separate that from the drug. Small sample, mostly white participants, four week window.

Davis et al. Effects of Psilocybin-Assisted Therapy on Major Depressive Disorder. JAMA Psychiatry, 2021.

Read the source

Every trial in this section used a single large dose, given in a clinic, with trained people in the room for the whole session. That is a different activity from anything sold on this site. More on why that distinction matters.

For education, not medical advice. Every write-up links back to the original source.
Nothing here is a claim that our products treat, cure or prevent any condition. Talk to a doctor before changing anything about your health.