Surprising Variability in Tryptamine Profiles of Psilocybe cubensis Fruiting Bodies: Inter- and Intra-Strain Differences Across 14 Strains Cultivated Under Controlled Conditions
Journal of Fungi July 2, 2026 Amiel Sharchaton, Shilat Parsha, Sara P. Azerrad et al.
Even when grown under identical conditions, different strains of the same mushroom species, Psilocybe cubensis, vary dramatically in their psychedelic compound content. Total tryptamine concentrations ranged more than 7.8-fold across 14 strains, from 2.62 to 20.65 mg per gram of dried mushroom. Psilocybin was always the most abundant compound. Individual mushrooms from the same strain also showed substantial variation, with psilocybin levels differing by 12.81% to 23.39% between fruiting bodies. This biochemical variability, both between strains and within a single strain, makes it difficult to standardize whole mushroom preparations for research or therapeutic use, emphasizing the need for careful strain selection, chemical profiling, and precise dosing.