Oooooooh, thank you @Junmaro . I find all of this so interesting. So glad that they are doing more and more research into how it all works.
To my great surprise, I am a super-responder. Never got beyond 2.5mg dose. I also have IBS, of which one of my symptoms is rapid digestive transit, and the MJ gets rid of it completely. I've come off it a few times to try and maintain without and the IBS comes back again.