An article from New Atlas on a John Hopkins study attempting to distinguish the benefits between various psilocybin dosage amounts:

“Critically, even the lowest amount used in the study resulted in notable and long-lasting positive changes in the attitudes, behavior, overall satisfaction and spiritual beliefs of the subjects during the period of study. These changes were also noticed by family members and friends.

“We seem to have found levels of the substance and particular conditions for its use that give a high probability of a profound and beneficial experience, a low enough probability of psychological struggle, and very little risk of any actual harm,” says lead author of the study, Roland Griffiths, Ph.D.”

Link to the full article here:

https://newatlas.com/johns-hopkins-psilocybin-study-finds-optimum-beneficial-dosage/18981/