Veterans attending naturalistic psilocybin or ayahuasca retreats showed significant improvements across eight mental‑health and reintegration measures, with the largest reductions in depression (PHQ‑9, 29.1%) and PTSD (PCL‑5, 26.1%). Psilocybin retreats produced greater gains on most outcomes while ayahuasca yielded slightly larger PTSD improvement; those with worse baseline symptoms benefited most, with some gender-specific differences.
- Published
- Journal
- Brain and Behavior
- Authors
- Calnan, M., Blest-Hopley, G., Busch, C., Adams, M., Ruffell, S. G. D., Piper, T., Roseman, L., Kettner, H., Carhart-Harris, R.