IIRC, gwern tends to focus on cognitive enhancers, or psychoactive drugs that could theoretically be used for that purpose (like the LSD microdosing experiment)

IIRC, gwern tends to focus on cognitive enhancers, or psychoactive drugs that could theoretically be used for that purpose (like the LSD microdosing experiment). I don't think he takes hallucinogens recreationally (or if he does, he doesn't write about it)