At the forefront of this movement is 1p lsd, a semi-synthetic psychedelic that mirrors the effects of LSD-25 but is considered legal in some jurisdictions due to its distinct chemical structure.

(Document 6) * A 1956 memo in which MKULTRA chief Sidney Gottlieb signs off a project that would "evaluate the effects of large doses of LSD-25 in normal human volunteers" on federal prisoners in ...