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The Content of Psilocybin in Norwegian Psilocybe semilanceata

Anders Christiansen, Knut Rasmussen, Klaus Høiland

Planta Medica July 1, 1981 DOI: 10.1055/s-2007-971632 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Observational study Peer reviewed
Population Psilocybe semilanceata mushrooms collected in Norway
Topics Psilocybin
Keywords Hallucinogen Mushroom Traditional medicine
Citations 20
Key findings Psilocybin content in dried Norwegian Psilocybe semilanceata ranged from 0.17 to 1.96%, with higher percentage concentrations in smaller mushrooms and higher total amounts in larger mushrooms.

Abstract

Psilocybe semilanceata contains hallucinogenic indole alkaloids and has been used as a narcotic drug in Norway. The content of psilocybin, the major constituent in Norwegian P. semilanceata, has been investigated as well as its habitats and its distribution throughout the country. The mushroom is growing on grassy sites in most parts of Norway from the middle of August to the middle of October. The psilocybin content in dried mushrooms varied considerably, from 0.17 to 1.96%. The highest concentrations in percent was found among the smaller mushrooms whereas the content in mg was highest in larger mushrooms. The content of psilocybin makes P. semilanceata to a potent hallucinogenic drug.

Comparable studies

Other observational and cohort studies on psilocybin, most cited first.

Study Year Design Participants
Psilocybin for treatment-resistant depression: fMRI-measured brain mechanisms. Patients with treatment-resistant depression 2017 Observational cohort n = 19
Psychedelic effects of psilocybin correlate with serotonin 2A receptor occupancy and plasma psilocin levels Healthy volunteers 2019 Observational cohort n = 8
Increased spontaneous MEG signal diversity for psychoactive doses of ketamine, LSD and psilocybin Humans 2017 Observational study
Classic psychedelic use is associated with reduced psychological distress and suicidality in the United States adult population. USA adult respondents from the National Survey on Drug Use and Health (2008-2012) 2015 Observational cohort n = 190,000
Prediction of Psilocybin Response in Healthy Volunteers Healthy volunteers 2012 Observational cohort n = 409

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