I took MJ for two months with a lower BMI than is usually approved for treatment because of a separate medical issue.
I lost two stone almost without trying in three months. Incredible result, but these are the main - unexpected - takeways for me, that I'm still pondering:
I had no desire at all to drink alcohol (usually LOVE a couple of glasses in the evening)
My ADHD symptoms were improved beyond anything I thought possible
I have no desire at all to touch sugar/sweet things/chocolate etc. or fatty, unhealthy foods
Both on MJ, and afterwards, I only wanted to eat healthy foods as a rule
I'm not given to wild theories, but I cannot help agreeing with pps that there are industries with profits of billions relying on people - often women - not being able to conquer this stuff.