Standardization of Psilocybin Dosing in a Natural Product–Based Retreat Setting: A Practical Method for Dose Quantification and Adjustment Across Sessions
Sergio Pérez Rosal, Sonya C. Faber
Research Square November 17, 2025 preprint DOI: 10.21203/rs.3.rs-8000629/v1 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Observational study |
|---|---|
| Sample size | 11 |
| Population | Individuals participating in a psilocybin retreat |
| Intervention | psilocybin-containing mushrooms |
| Dose | two doses, with the second approximately twice the first |
| Duration | 7-day retreat |
| Topics | Psilocybin |
| Keywords | Dosing Standardization Natural archaeology Observational study Pharmacology Intensive care medicine Hallucinogen |
| Key findings | Chemically analyzing psilocybin content rather than relying on weight revealed large variability across mushroom samples, and standardizing doses based on measured concentration allowed for planned dose adjustments to compensate for acute tolerance. |
Abstract
Abstract Natural variation in psilocybin content across mushroom samples presents a significant challenge to consistent dosing in both research and retreat settings. In this observational report, we describe a pragmatic approach for quantifying psilocybin content in naturally sourced material to ensure more standardized dosing across participants. Eleven individuals participated in a 7-day psilocybin retreat, receiving two doses of psilocybin-containing mushrooms. The psilocybin content was chemically analyzed rather than inferred from weight, revealing large variability across samples. Standardization based on measured psilocybin concentration allowed for dose adjustments, including a planned increase of the second dose to approximately twice the first to compensate for known acute tolerance effects. This method provides a model for responsible natural product use in community or retreat settings and can inform future translational research.