[magnamerc]

You can buy pre-cursors (or known as analogs) like 4-AcO-DMT online from Lysergi. They are sold as a 'research chemical', however they metabolize into psilocin so it is indistinguishable to psilocybin. Obviously you should take every pre-caution before ingesting any substance by doing your own research, and looking into the authenticity of the supplier.

[monktastic1]

FWIW, I can tell you that not everyone finds them to be indistinguishable.

[cwkoss]

pedantic semantic quibble: precursors are molecules that are used to produce a target molecule. Analogs are molecules which are a functional substitute for a target molecule.

5-Aco-DMT is an analog to psilocin, and is believed to be a prodrug (converted into target by your body), but I think precursor is a misnomer in this case.

[magnamerc]

Yeah that's why I added analog in brackets haha. But I believe you're correct