I think his point was that these symptoms could be correlation, not causation. So you need to work to prevent each of them as you age. (Eg that flossing is good

I think his point was that these symptoms could be correlation, not causation. So you need to work to prevent each of them as you age. (Eg that flossing is good for your oral health, even though it might have no influence on other factors associated with being old)