1P-LSD is a legal substitute to the classical psychedelic, LSD. 1P-LSD offers similar benefits as LSD when taken as a microdose.

1P-LSD is subjectively similar to LSD, with many users finding the effects to be practically identical. Chemically, the difference between the two is that 1P-LSD has a small propionyl group bonded to the 1-position of LSD’s indole ring.[5]

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