Comment by Analemma_

I think more important than that is capping the THC/CBD ratio. The first time I took an edible it was pure THC, and even at 15mg it almost gave me a panic attack. For a long time I was baffled that anyone could actually enjoy marijuana, until I tried something with three times as much CBD as THC, and then I got the same enjoyable experience as others seem to. Which makes sense: biologically, THC is the psychosis agonist and CBD is the modulating antipsychotic. I have high confidence that it's the widespread use of THC-without-CBD strains that's driving most of the psychosis risk.