This was in the news recently.
salk.edu/news-release/canna...
Here is the science behind the endocannabinoid system in the human body.
researchgate.net/publicatio...
I had been giving my dad thc oil in capsule form at night to help him sleep. He loved them initially, but then he started breaking his computer without knowing how to fix it. He's normally a computer wiz. And he was having bad days, one after the other. Like the disease was progressing every day. It got to the point where they were considering cancelling their cruise. We didn't want them to take any of the thc pills through customs or anything so we decided to take him off them. Immediately he was back to his normal self. Wasn't bouncing off any walls, fixing his computer no problem. He was back to how he was before he took the thc pills.
I'm not an expert but my opinion was that the thc was shrinking the brain at night allowing it to clean itself better than normally. But because I'm no expert we decided it was quite possible that the pills were causing the disease to progress and he should not take them anymore.
After reading the new info we are rethinking our position and I think we are going to try ground cannabis in capsules rather than the higher strength oil we tried initially. This way we can control the dose better and start of really low and build it up until we notice anything bad and back off a bit. We will use cannabis that is 1:1 thc/cbd. This will minimise the psychoactive effect of the thc.
There is a legal thc mouth spray made in the uk and available from the NHS called Sativex, but it's only allowed to be given to ppl with MS. With this new info I would hope they might expand upon this and allow ppl with Neurodegenerative diseases like Alzheimer's, Parkinson's, PSP, CBD, MSA etc access. In fact, we should start a petition.