I thought that was pretty strongly established.
London researchers determined that Long term cannabis users developed brain damage in the same area of the brain that bipolar and schizophrenia patients show damage.
Have been attacked here on FR discussing the genetic linked schizophrenic/schizoid response studied and proven to have susceptible gene coding to reaction to THC and other psychotropic cannabinoids. Whereas pure CBD cannabidiol is a wonder drug... that is the CBD that has 0% THC.
The UK pioneered these studies and they have proven it.
The genetic linkage has been mapped— one gene one enzyme response.
Shhhh! The medical pot head proselytizers don’t want to hear about these studies it interferes with their lies about its medical benefits which are very minimal at best.