so, you didn't ask the question - which is obvious to anyone with a brain -
Guess you're so smart you don't need anyone else's opinion and surely not from one who lacks a brain.
Cancer causes for you is all sorted - no need to ask more questions.
As for smoking, vaping or other substance replacements/abuses I'm ok, as I personally do not indulge. Prefer good food - even croissants and baguettes - maybe some brain cells are still functioning - from which it follows there is a brain, after all. Now if only I could remember where I put that croissant or was that baguette. Perhaps you know, please let me know.
