can smoking cigarettes give you diarrhea and IBS: What Does the Research Say? Can nicotine patches cause diarrhea?

A study performed by the Harvard School of Public Health reported that many flavoring chemicals in e-cigarettes caused popcorn lung, a rare respiratory disease previously most commonly reported in those working in popcorn factories

However, some doctors and nurses continue to smoke

Blender Artists Community "Skull of a Skeleton with Burning Cigarette" By Vincent Van Gogh Artwork Finished Projects animation, lighting, painterly, shading, characters Seth_Hedgepath (Seth Hedgepath) March 22, 2023, 2:27pm 1 Here is my animated recreation of the famous artwork by Vincent Van Gogh

The WHO report cites several observational studies

This approach became widely known after researchers associated with Berkeley Earth demonstrated how air pollution exposure could be expressed in cigarette equivalents based on mortality risk