Earlier quoted context omitted.
> Doesn’t mean smoking cigarettes is good for working. Fun fact; smoking likely is! There have been numerous studies into nicotine as a nootropic, eg https://pubmed.ncbi.nlm.nih.gov/1579636/#:~:text=Abstract,sh... which have found that nicotine improves attention and memory. Shame about the lung cancer though.
Nicotine does not cause cancer. Smoke do
Yes however nicotine can speed up the growth of existing cancers.