Psilocin

Psilocin (4-hydroxy-N,N-dimethyltryptamine or 4-HO-DMT) is the pharmacologically active metabolite of psilocybin. While psilocybin is often discussed as the "active ingredient" in magic mushrooms, it is actually psilocin that produces the psychedelic experience by directly interacting with brain receptors.

Chemical Properties

Psilocin has the molecular formula C₁₂H₁₆N₂O. It differs from psilocybin by lacking the phosphate group, which makes it less stable but able to cross the blood-brain barrier. Psilocin is also naturally present in some mushroom species, though typically in lower concentrations than psilocybin.

Mechanism of Action

Psilocin primarily exerts its effects by binding to serotonin receptors in the brain, particularly the 5-HT2A receptor. This binding triggers a cascade of effects:

• Increased neural connectivity: Brain imaging work (e.g. Imperial College London, 2012 onward) shows that psilocin increases communication between brain regions that don't normally interact, potentially explaining the novel thoughts and perceptions during a trip.

• Default Mode Network suppression: Psilocin reduces activity in the Default Mode Network (DMN), the brain system associated with ego and self-referential thinking. This may explain experiences of ego dissolution.

• Neuroplasticity: Research suggests psilocin promotes the growth of new neural connections, which may underlie its therapeutic potential.

Onset and Duration

Because psilocybin must first convert to psilocin, effects typically begin 20-60 minutes after ingestion. Peak effects occur around 1-2 hours and gradually subside over 4-6 hours. The conversion rate can vary based on individual metabolism, stomach contents, and other factors.

Potency Considerations

Different mushroom strains contain different ratios of psilocybin to psilocin. Strains with higher natural psilocin content may have faster onset times. However, psilocin degrades more quickly than psilocybin, so older or improperly stored mushrooms may have reduced potency.