[donaldguy]

HPPD is definitely a real thing: https://en.wikipedia.org/wiki/Hallucinogen_persisting_percep...

And there is some evidence that taking psychedelics can precipitate long lasting or even chronic psychosis in those with genetic predispositions

I interpreted what they said as a reflection of those facts, though you are correct that risk of dependence is relatively low

[ch4s3]

Sort of...

If you're familiar with the literature you'll find meta-analysis with a lot of phrases like "At present, HPPD appears to be a genuine but uncommon disorder". YEah, its in the DSM, but at best it's vanishingly rare. And according to the DSM past hallucinogen in combination with the symptoms alone is not enough to constitute a diagnosis of HPPD. It's also tangled up with a number of other confounding mental illnesses. And, even still it's believed that a user must possess preexisting risk factors in addition to heavy use to trigger HPPD. What I'm driving at is that microdosing is almost certainly unlikely to cause HPPD in healthy adults.

[fsiefken]

How do you know HPPD's occur when regularly taking microdoses instead of regal perception changing doses? It hasn't been investigated and I haven't read about it in anecdotal reports