What's wrong with light heroin use? I doubt it's a problem. You seem like some sort of puritan.
I don't think much of anything you've said or linked has bearing on a cigarette a day in the context of a healthy diet. Are you as dogmatic about not living in cities? Because urban air pollution is a known stressor.
So now you're agreeing that known "stressors" like dirty air are in fact problematic.
Why don't you tell us more about the "open questions" of how safe dirty needles and dirty nicotine delivery systems are.
Now if you'll excuse me, you seem like someone uninterested in reason or in supporting your silly, shifting claims, and who is much more interested in rationalizing your own bad health habits.
I don't think much of anything you've said or linked has bearing on a cigarette a day in the context of a healthy diet. Are you as dogmatic about not living in cities? Because urban air pollution is a known stressor.