Already done. THC has been synthesized and put in a non-intoxicating oral form for some time now.
I’d like to hope CBD would also have this amazing effect on the brain developing Alzheimer’s. Taking CBD oil is simple and you can live your life. There is usually a tiny bit of THC in it but the CBD counteracts the high. CBD is what medical marijuana patients who actually take it for serious conditions are taking.
Please remember: SMOKING is very unhealthy and puts toxins right into your brain, and that includes smoking marijuana. However, vaping, taking oils or tinctures orally, are healthy ways to ingest a medicinal herb. So if you are reading this and want to do your own experiment on Grandma, DO NOT HAVE HER START SMOKING LEAVES. Get oils or vaping stuff.
Thanks for clarifying.