“LSD is physiologically well tolerated and there is no evidence for long-lasting effects on brain and other parts of the human organism”
Foolish. My best friend from college days got deep into acid; He’d trip for 3 days at a time, on and off again for a period of couple of years.
His ability to rationalize diminished, his attention span shrank, and it got to the point where he became too weird to be around.
30 years later I still can’t carry on an intellectual conversation with him.
2nd case, another college friend inherited a farm in the mountains, a pile of cash from his grandfather and immediately dropped out of school and started following the Grateful Dead around. He got so baked that when we all caught back up 5 years later he didn’t recognize me or 1/2 the others who used to hang out with him daily over a two year period.
Again the plural of anecdote isn’t fact. What else was he doing in that 3 day period? Or the period of years? Other drugs? Booze? Sleep deprivation (which has been shown to do a lot of damage)? Maybe he just had issues and nobody had spotted them yet.