I don't know how you determine causality of dementia. But smoking leads to poor heart and lung health and function, and that's got to have follow on effects on

I don't know how you determine causality of dementia. But smoking leads to poor heart and lung health and function, and that's got to have follow on effects on brain health. And there's correlation linking smoking to dementia [1]. So, I think it's fair to say grandma smokes a lot who had dementia got it from smoking even without a specific link. [1] https://www.heart.org/en/news/2021/07/06/smoking-harms-the-brain-raises-dementia-risk-but-not-if-you-quit https://www.heart.org/en/news/2021/07/06/smoking-harms-the-b...