Psilocin

Definition

Psilocin (4-hydroxy-N,N-dimethyltryptamine) is the compound that psilocybin becomes once the body removes its phosphate group. Unlike psilocybin, psilocin readily crosses the blood-brain barrier and binds serotonin receptors — chiefly 5-HT2A — producing the perceptual, emotional, and cognitive changes associated with a psychedelic mushroom experience. Psilocin is chemically unstable outside the body, oxidizing on exposure to air.

Why Psilocin Is the "Active" Half of the Equation

Psilocybin and psilocin are often mentioned together, but only psilocin does the pharmacological work. The conversion — dephosphorylation — happens quickly in the body after ingestion, which is one reason effects don't begin the instant mushrooms are eaten; there's a short metabolic lag before enough psilocin is circulating to cross into the brain. Once there, psilocin's affinity for 5-HT2A receptors, concentrated in areas like the prefrontal cortex, is thought to underlie the altered sense of self, time, and perception that define the experience, including phenomena like ego dissolution.

Outside the controlled environment of the body, psilocin is far less stable than psilocybin. It oxidizes readily when exposed to air, heat, or light, which is the chemical basis of bluing — the blue-green discoloration that appears when psilocybin mushrooms are bruised, cut, or handled. That instability is also why fresh, bruised mushrooms and prepared teas or extracts are generally considered less shelf-stable than properly dried whole mushrooms, where the compound is still mostly present as psilocybin rather than free psilocin.

Because psilocin is metabolized further and eliminated from the body relatively quickly, its effects — while intense — are time-limited, typically resolving within a matter of hours depending on dose and individual factors.

Definition

Why Psilocin Is the "Active" Half of the Equation

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