It probably causes schitophrenia/bipolar disorder like cannibas does.
______
I should have known my bipolar and 76 year old mother was a flippin’ stoner.
For the record, she smoked reefer once, with me, while dad was on a business trip. In 1978.
Since you seem to be up on the studies indicating this, what percentage of users of marijuana develop these 2 entirely different disorders? How much do they have to smoke? Over what period of time? What other substances did these patients use? Any alcohol, cocaine, LSD, anything else?
If the Harvard study is correct and pot use causes bi-polar disease, that does not imply that all people who are bi-polar were potheads. So give your ma a break. It might not be your fault for smoking pot with her.
The two disorders are not entirely different. They were thought to be, but recent studies have blurred the lines between the two. The same areas of the brain are affected. And depending on who you read, each is sometimes considered a specialized subset of the other.
And I haven’t read the harvard study in it’s entirety. I don’t have the answers to your other questions.
Before you swing entirely to the other pole over this, someone is claiming a Keele study exists that disproves the Harvard one. Haven’t checked into it.