YUP, I have herd of this too, there was a study done, also its longterm use like 30 plus years of heavy usage, those people also by then, are slow and almost brain dead. I don't think I would use it long term either, I tried CBD and did not get good results, aim like 50 now so if i use daily, and live to be 80? I might be have dementia by then and forget all about my EMET,LOL